2024-09-09 11:22:42 +02:00
41 changed files with 1042 additions and 158 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -6,11 +6,14 @@ bugs in actually-released versions.

 ## 3.6 - in development

+- Change the name of the add-on from "Flamenco 3" to just "Flamenco".
 - Add `label` to job settings, to have full control over how they are presented in Blender's job submission GUI. If a job setting does not define a label, its `key` is used to generate one (like Flamenco 3.5 and older).
 - Add `shellSplit(someString)` function to the job compiler scripts. This splits a string into an array of strings using shell/CLI semantics.
 - Make it possible to script job submissions in Blender, by executing the `bpy.ops.flamenco.submit_job(job_name="jobname")` operator.
 - Security updates of some deendencies:
  - [GO-2024-2937: Parsing a corrupt or malicious image with invalid color indices can cause a panic](https://pkg.go.dev/vuln/GO-2024-2937)
+- Web interface: list the job's worker tag in the job details.
+- Ensure the submitted scene is rendered in a multi-scene blend file.

 ## 3.5 - released 2024-04-16

--- a/README.md
+++ b/README.md
@ -1,6 +1,6 @@
-# Flamenco 3
+# Flamenco

-This repository contains the sources for Flamenco 3. The Manager, Worker, and
+This repository contains the sources for Flamenco. The Manager, Worker, and
 Blender add-on sources are all combined in this one repository.

 The documentation is available on https://flamenco.blender.org/, including
--- a/addon/README.md
+++ b/addon/README.md
@ -1,4 +1,4 @@
-# Flamenco 3 Blender add-on
+# Flamenco Blender add-on

 ## Setting up development environment

--- a/addon/flamenco/init.py
+++ b/addon/flamenco/init.py
@ -3,7 +3,7 @@
 # <pep8 compliant>

 bl_info = {
-    "name": "Flamenco 3",
+    "name": "Flamenco",
    "author": "Sybren A. Stüvel",
    "version": (3, 6),
    "blender": (3, 1, 0),
@ -156,6 +156,12 @@ def register() -> None:
        max=100,
    )

+    bpy.types.Scene.flamenco_job_submit_as_paused = bpy.props.BoolProperty(
+        name="Flamenco Job Submit as Paused",
+        description="Whether the job is paused initially; Checked sets the job to `paused`, and Unchecked sets the job to `queued`",
+        default=False,
+    )
+
    preferences.register()
    worker_tags.register()
    operators.register()
--- a/addon/flamenco/bat/shaman.py
+++ b/addon/flamenco/bat/shaman.py
@ -32,6 +32,7 @@ MAX_FAILED_PATHS = 8
 HashableShamanFileSpec = tuple[str, int, str]
 """Tuple of the 'sha', 'size', and 'path' fields of a ShamanFileSpec."""

+
 # Mypy doesn't understand that submodules.pack.Packer exists.
 class Packer(submodules.pack.Packer):  # type: ignore
    """Creates BAT Packs on a Shaman server."""
--- a/addon/flamenco/gui.py
+++ b/addon/flamenco/gui.py
@ -22,7 +22,7 @@ class FLAMENCO_PT_job_submission(bpy.types.Panel):
    bl_space_type = "PROPERTIES"
    bl_region_type = "WINDOW"
    bl_context = "output"
-    bl_label = "Flamenco 3"
+    bl_label = "Flamenco"

    # A temporary job can be constructed so that dynamic, read-only properties can be evaluated.
    # This is only scoped to a single draw() call.
@ -42,6 +42,9 @@ class FLAMENCO_PT_job_submission(bpy.types.Panel):
        col = layout.column(align=True)
        col.prop(context.scene, "flamenco_job_name", text="Job Name")
        col.prop(context.scene, "flamenco_job_priority", text="Priority")
+        col.prop(
+            context.scene, "flamenco_job_submit_as_paused", text="Submit as Paused"
+        )

        # Refreshables:
        col = layout.column(align=True)
@ -50,7 +53,7 @@ class FLAMENCO_PT_job_submission(bpy.types.Panel):
        )
        if not job_types.are_job_types_available():
            return
-        col.prop(context.scene, "flamenco_worker_tag", text="Tag")
+        col.prop(context.scene, "flamenco_worker_tag", text="Worker Tag")

        # Job properties:
        job_col = layout.column(align=True)
--- a/addon/flamenco/job_submission.py
+++ b/addon/flamenco/job_submission.py
@ -33,6 +33,7 @@ log = logging.getLogger(__name__)

 def job_for_scene(scene: bpy.types.Scene) -> Optional[_SubmittedJob]:
    from flamenco.manager.models import SubmittedJob, JobMetadata
+    from flamenco.manager.model.job_status import JobStatus

    propgroup = getattr(scene, "flamenco_job_settings", None)
    assert isinstance(propgroup, JobTypePropertyGroup), "did not expect %s" % (
@ -44,6 +45,12 @@ def job_for_scene(scene: bpy.types.Scene) -> Optional[_SubmittedJob]:

    priority = getattr(scene, "flamenco_job_priority", 50)

+    submit_as_paused = getattr(scene, "flamenco_job_submit_as_paused", False)
+    if submit_as_paused:
+        initial_status = JobStatus("paused")
+    else:
+        initial_status = JobStatus("queued")
+
    job: SubmittedJob = SubmittedJob(
        name=scene.flamenco_job_name,
        type=propgroup.job_type.name,
@ -52,6 +59,7 @@ def job_for_scene(scene: bpy.types.Scene) -> Optional[_SubmittedJob]:
        metadata=metadata,
        submitter_platform=platform.system().lower(),
        type_etag=propgroup.job_type.etag,
+        initial_status=initial_status,
    )

    worker_tag: str = getattr(scene, "flamenco_worker_tag", "")
--- a/addon/flamenco/operators.py
+++ b/addon/flamenco/operators.py
@ -126,6 +126,7 @@ class FLAMENCO_OT_submit_job(FlamencoOpMixin, bpy.types.Operator):
    def poll(cls, context: bpy.types.Context) -> bool:
        # Only allow submission when there is a job type selected.
        job_type = job_types.active_job_type(context.scene)
+        cls.poll_message_set("No job type selected")
        return job_type is not None

    def execute(self, context: bpy.types.Context) -> set[str]:
@ -335,11 +336,18 @@ class FLAMENCO_OT_submit_job(FlamencoOpMixin, bpy.types.Operator):
                )
                prefs.experimental.use_all_linked_data_direct = True

-            filepath = Path(context.blend_data.filepath).with_suffix(".flamenco.blend")
-            self.log.info("Saving copy to temporary file %s", filepath)
-            bpy.ops.wm.save_as_mainfile(
-                filepath=str(filepath), compress=True, copy=True
-            )
+            filepath = Path(context.blend_data.filepath)
+            if job_submission.is_file_inside_job_storage(context, filepath):
+                self.log.info(
+                    "Saving blendfile, already in shared storage: %s", filepath
+                )
+                bpy.ops.wm.save_as_mainfile()
+            else:
+                filepath = filepath.with_suffix(".flamenco.blend")
+                self.log.info("Saving copy to temporary file %s", filepath)
+                bpy.ops.wm.save_as_mainfile(
+                    filepath=str(filepath), compress=True, copy=True
+                )
            self.temp_blendfile = filepath
        finally:
            # Restore the settings we changed, even after an exception.
--- a/cmd/flamenco-manager/main.go
+++ b/cmd/flamenco-manager/main.go
@ -148,7 +148,13 @@ func runFlamencoManager() bool {
 		log.Fatal().Err(err).Msg("unable to figure out my own URL")
 	}

-	ssdp := makeAutoDiscoverable(urls)
+	// Construct the UPnP/SSDP server.
+	var ssdp *upnp_ssdp.Server
+	if configService.Get().SSDPDiscovery {
+		ssdp = makeAutoDiscoverable(urls)
+	} else {
+		log.Debug().Msg("UPnP/SSDP autodiscovery disabled in configuration")
+	}

 	// Construct the services.
 	persist := openDB(*configService)
--- a/internal/manager/api_impl/jobs_query_test.go
+++ b/internal/manager/api_impl/jobs_query_test.go
@ -89,6 +89,56 @@ func TestQueryJobs(t *testing.T) {
 	assertResponseJSON(t, echoCtx, http.StatusOK, expectedJobs)
 }

+func TestFetchJob(t *testing.T) {
+	mockCtrl := gomock.NewController(t)
+	defer mockCtrl.Finish()
+
+	mf := newMockedFlamenco(mockCtrl)
+
+	dbJob := persistence.Job{
+		UUID:     "afc47568-bd9d-4368-8016-e91d945db36d",
+		Name:     "работа",
+		JobType:  "test",
+		Priority: 50,
+		Status:   api.JobStatusActive,
+		Settings: persistence.StringInterfaceMap{
+			"result": "/render/frames/exploding.kittens",
+		},
+		Metadata: persistence.StringStringMap{
+			"project": "/projects/exploding-kittens",
+		},
+		WorkerTag: &persistence.WorkerTag{
+			UUID:        "d86e1b84-5ee2-4784-a178-65963eeb484b",
+			Name:        "Tikkie terug Kees!",
+			Description: "",
+		},
+	}
+
+	echoCtx := mf.prepareMockedRequest(nil)
+	mf.persistence.EXPECT().FetchJob(gomock.Any(), dbJob.UUID).Return(&dbJob, nil)
+
+	require.NoError(t, mf.flamenco.FetchJob(echoCtx, dbJob.UUID))
+
+	expectedJob := api.Job{
+		SubmittedJob: api.SubmittedJob{
+			Name:     "работа",
+			Type:     "test",
+			Priority: 50,
+			Settings: &api.JobSettings{AdditionalProperties: map[string]interface{}{
+				"result": "/render/frames/exploding.kittens",
+			}},
+			Metadata: &api.JobMetadata{AdditionalProperties: map[string]string{
+				"project": "/projects/exploding-kittens",
+			}},
+			WorkerTag: ptr("d86e1b84-5ee2-4784-a178-65963eeb484b"),
+		},
+		Id:     "afc47568-bd9d-4368-8016-e91d945db36d",
+		Status: api.JobStatusActive,
+	}
+
+	assertResponseJSON(t, echoCtx, http.StatusOK, expectedJob)
+}
+
 func TestFetchTask(t *testing.T) {
 	mockCtrl := gomock.NewController(t)
 	defer mockCtrl.Finish()
--- a/internal/manager/api_impl/varrepl_test.go
+++ b/internal/manager/api_impl/varrepl_test.go
@ -243,6 +243,85 @@ func TestReplaceTwoWayVariables(t *testing.T) {
 	}
 }

+// TestReplaceTwoWayVariablesFFmpegExpression tests that slashes (for division)
+// in an FFmpeg filter expression are NOT replaced with backslashes when sending
+// to a Windows worker.
+func TestReplaceTwoWayVariablesFFmpegExpression(t *testing.T) {
+	c := config.DefaultConfig(func(c *config.Conf) {
+		// Mock that the Manager is running Linux.
+		c.MockCurrentGOOSForTests("linux")
+
+		// Trigger a translation of a path in the FFmpeg command arguments.
+		c.Variables["project"] = config.Variable{
+			IsTwoWay: true,
+			Values: []config.VariableValue{
+				{Value: "/projects/charge", Platform: config.VariablePlatformLinux, Audience: config.VariableAudienceAll},
+				{Value: `P:\charge`, Platform: config.VariablePlatformWindows, Audience: config.VariableAudienceAll},
+			},
+		}
+	})
+
+	task := api.AssignedTask{
+		Job:         "f0bde4d0-eaaf-4ee0-976b-802a86aa2d02",
+		JobPriority: 50,
+		JobType:     "simple-blender-render",
+		Name:        "preview-video",
+		Priority:    50,
+		Status:      api.TaskStatusQueued,
+		TaskType:    "ffmpeg",
+		Uuid:        "fd963a82-2e98-4a39-9bd4-c302e5b8814f",
+		Commands: []api.Command{
+			{
+				Name: "frames-to-video",
+				Parameters: map[string]interface{}{
+					"exe":        "ffmpeg",                             // Should not change.
+					"fps":        24,                                   // Should not change type.
+					"inputGlob":  "/projects/charge/renders/*.webp",    // Path, should change.
+					"outputFile": "/projects/charge/renders/video.mp4", // Path, should change.
+					"args": []string{
+						"-vf", "pad=ceil(iw/2)*2:ceil(ih/2)*2", // Should not change.
+						"-fake-lut", `/projects/charge/ffmpeg.lut`, // Path, should change.
+					},
+				},
+			},
+		},
+	}
+
+	worker := persistence.Worker{Platform: "windows"}
+	replacedTask := replaceTaskVariables(&c, task, worker)
+
+	expectTask := api.AssignedTask{
+		Job:         "f0bde4d0-eaaf-4ee0-976b-802a86aa2d02",
+		JobPriority: 50,
+		JobType:     "simple-blender-render",
+		Name:        "preview-video",
+		Priority:    50,
+		Status:      api.TaskStatusQueued,
+		TaskType:    "ffmpeg",
+		Uuid:        "fd963a82-2e98-4a39-9bd4-c302e5b8814f",
+		Commands: []api.Command{
+			{
+				Name: "frames-to-video",
+				Parameters: map[string]interface{}{
+					"exe": "ffmpeg",
+					"fps": 24,
+					// These two parameters matched a two-way variable:
+					"inputGlob":  `P:\charge\renders\*.webp`,
+					"outputFile": `P:\charge\renders\video.mp4`,
+					"args": []string{
+						// This parameter should not change:
+						"-vf", "pad=ceil(iw/2)*2:ceil(ih/2)*2",
+						// This parameter should change:
+						"-fake-lut", `P:\charge\ffmpeg.lut`,
+					},
+				},
+			},
+		},
+	}
+
+	assert.Equal(t, expectTask, replacedTask)
+}
+
 func varReplSubmittedJob() api.SubmittedJob {
 	return api.SubmittedJob{
 		Type:              "simple-blender-render",
@ -273,7 +352,7 @@ func varReplSubmittedJob() api.SubmittedJob {
 }

 // jsonWash converts the given value to JSON and back.
-// This makes sure the types are as closed to what the API will handle as
+// This makes sure the types are as close to what the API will handle as
 // possible, making the difference between "array of strings" and "array of
 // interface{}s that happen to be strings".
 func jsonWash[T any](value T) T {
--- a/internal/manager/api_impl/worker_mgt.go
+++ b/internal/manager/api_impl/worker_mgt.go
@ -313,8 +313,11 @@ func (f *Flamenco) FetchWorkerTag(e echo.Context, tagUUID string) error {
 		logger.Error().Err(err).Msg("fetching worker tag")
 		return sendAPIError(e, http.StatusInternalServerError, "error fetching worker tag: %v", err)
 	}
+	if tag == nil {
+		panic("Could fetch a worker tag without error, but then the returned tag was still nil")
+	}

-	return e.JSON(http.StatusOK, workerTagDBtoAPI(*tag))
+	return e.JSON(http.StatusOK, workerTagDBtoAPI(tag))
 }

 func (f *Flamenco) UpdateWorkerTag(e echo.Context, tagUUID string) error {
@ -387,8 +390,8 @@ func (f *Flamenco) FetchWorkerTags(e echo.Context) error {

 	apiTags := []api.WorkerTag{}
 	for _, dbTag := range dbTags {
-		apiTag := workerTagDBtoAPI(*dbTag)
-		apiTags = append(apiTags, apiTag)
+		apiTag := workerTagDBtoAPI(dbTag)
+		apiTags = append(apiTags, *apiTag)
 	}

 	tagList := api.WorkerTagList{
@ -443,7 +446,7 @@ func (f *Flamenco) CreateWorkerTag(e echo.Context) error {
 	sioUpdate := eventbus.NewWorkerTagUpdate(&dbTag)
 	f.broadcaster.BroadcastNewWorkerTag(sioUpdate)

-	return e.JSON(http.StatusOK, workerTagDBtoAPI(dbTag))
+	return e.JSON(http.StatusOK, workerTagDBtoAPI(&dbTag))
 }

 func workerSummary(w persistence.Worker) api.WorkerSummary {
@ -479,7 +482,7 @@ func workerDBtoAPI(w persistence.Worker) api.Worker {
 	if len(w.Tags) > 0 {
 		tags := []api.WorkerTag{}
 		for i := range w.Tags {
-			tags = append(tags, workerTagDBtoAPI(*w.Tags[i]))
+			tags = append(tags, *workerTagDBtoAPI(w.Tags[i]))
 		}
 		apiWorker.Tags = &tags
 	}
@ -487,7 +490,11 @@ func workerDBtoAPI(w persistence.Worker) api.Worker {
 	return apiWorker
 }

-func workerTagDBtoAPI(wc persistence.WorkerTag) api.WorkerTag {
+func workerTagDBtoAPI(wc *persistence.WorkerTag) *api.WorkerTag {
+	if wc == nil {
+		return nil
+	}
+
 	uuid := wc.UUID // Take a copy for safety.

 	apiTag := api.WorkerTag{
@ -497,5 +504,5 @@ func workerTagDBtoAPI(wc persistence.WorkerTag) api.WorkerTag {
 	if len(wc.Description) > 0 {
 		apiTag.Description = &wc.Description
 	}
-	return apiTag
+	return &apiTag
 }
--- a/internal/manager/config/variables.go
+++ b/internal/manager/config/variables.go
@ -106,6 +106,10 @@ func (ve *VariableExpander) Expand(valueToExpand string) string {
 	isPathValue := false
 	for varname, varvalue := range ve.targetTwoWayVars {
 		placeholder := fmt.Sprintf("{%s}", varname)
+		if !strings.Contains(expanded, placeholder) {
+			continue
+		}
+
 		expanded = strings.Replace(expanded, placeholder, varvalue, -1)

 		// Since two-way variables are meant for path replacement, we know this
--- a/internal/manager/job_compilers/job_compilers_test.go
+++ b/internal/manager/job_compilers/job_compilers_test.go
@ -139,6 +139,41 @@ func TestSimpleBlenderRenderHappy(t *testing.T) {
 	assert.Equal(t, expectDeps, tVideo.Dependencies)
 }

+func TestSimpleBlenderRenderWithScene(t *testing.T) {
+	c := mockedClock(t)
+
+	s, err := Load(c)
+	require.NoError(t, err)
+
+	// Compiling a job should be really fast.
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond)
+	defer cancel()
+
+	sj := exampleSubmittedJob()
+	sj.Settings.AdditionalProperties["scene"] = "Test Scene"
+	aj, err := s.Compile(ctx, sj)
+	require.NoError(t, err)
+	require.NotNil(t, aj)
+
+	t0 := aj.Tasks[0]
+	expectCliArgs := []interface{}{ // They are strings, but Goja doesn't know that and will produce an []interface{}.
+		"--scene", "Test Scene",
+		"--render-output", "/render/sprites/farm_output/promo/square_ellie/square_ellie.lighting_light_breakdown2/######",
+		"--render-format", "PNG",
+		"--render-frame", "1..3",
+	}
+	assert.Equal(t, "render-1-3", t0.Name)
+	assert.Equal(t, 1, len(t0.Commands))
+	assert.Equal(t, "blender-render", t0.Commands[0].Name)
+	assert.EqualValues(t, AuthoredCommandParameters{
+		"exe":        "{blender}",
+		"exeArgs":    "{blenderArgs}",
+		"blendfile":  "/render/sf/jobs/scene123.blend",
+		"args":       expectCliArgs,
+		"argsBefore": make([]interface{}, 0),
+	}, t0.Commands[0].Parameters)
+}
+
 func TestJobWithoutTag(t *testing.T) {
 	c := mockedClock(t)

--- a/internal/manager/job_compilers/scripts/simple_blender_render.js
+++ b/internal/manager/job_compilers/scripts/simple_blender_render.js
@ -32,6 +32,8 @@ const JOB_TYPE = {
          description: "File extension used when rendering images" },
        { key: "has_previews", type: "bool", required: false, eval: "C.scene.render.image_settings.use_preview", visible: "hidden",
          description: "Whether Blender will render preview images."},
+        { key: "scene", type: "string", required: true, eval: "C.scene.name", visible: "web",
+          description: "Name of the scene to render."},
    ]
 };

@ -100,6 +102,12 @@ function authorRenderTasks(settings, renderDir, renderOutput) {
    print("authorRenderTasks(", renderDir, renderOutput, ")");
    let renderTasks = [];
    let chunks = frameChunker(settings.frames, settings.chunk_size);
+
+    let baseArgs = [];
+    if (settings.scene) {
+      baseArgs = baseArgs.concat(["--scene", settings.scene]);
+    }
+
    for (let chunk of chunks) {
        const task = author.Task(`render-${chunk}`, "blender");
        const command = author.Command("blender-render", {
@ -107,11 +115,11 @@ function authorRenderTasks(settings, renderDir, renderOutput) {
            exeArgs: "{blenderArgs}",
            argsBefore: [],
            blendfile: settings.blendfile,
-            args: [
+            args: baseArgs.concat([
                "--render-output", path.join(renderDir, path.basename(renderOutput)),
                "--render-format", settings.format,
                "--render-frame", chunk.replaceAll("-", ".."), // Convert to Blender frame range notation.
-            ]
+            ])
        });
        task.addCommand(command);
        renderTasks.push(task);
--- a/internal/manager/job_compilers/scripts/single_image_render.js
+++ b/internal/manager/job_compilers/scripts/single_image_render.js
@ -0,0 +1,334 @@
+const JOB_TYPE = {
+  label: "Single Image Render",
+  description: "Distributed rendering of a single image.",
+  settings: [
+    // Settings for artists to determine:
+    {
+      key: "tile_size_x",
+      type: "int32",
+      default: 64,
+      description: "Tile size in pixels for the X axis"
+    },
+    {
+      key: "tile_size_y",
+      type: "int32",
+      default: 64,
+      description: "Tile size in pixels for the Y axis"
+    },
+    {
+      key: "frame", type: "int32", required: true,
+      eval: "C.scene.frame_current",
+      description: "Frame to render. Examples: '47', '1'"
+    },
+
+    // render_output_root + add_path_components determine the value of render_output_path.
+    {
+      key: "render_output_root",
+      type: "string",
+      subtype: "dir_path",
+      required: true,
+      visible: "submission",
+      description: "Base directory of where render output is stored. Will have some job-specific parts appended to it"
+    },
+    {
+      key: "add_path_components",
+      type: "int32",
+      required: true,
+      default: 0,
+      propargs: {min: 0, max: 32},
+      visible: "submission",
+      description: "Number of path components of the current blend file to use in the render output path"
+    },
+    {
+      key: "render_output_path", type: "string", subtype: "file_path", editable: false,
+      eval: "str(Path(abspath(settings.render_output_root), last_n_dir_parts(settings.add_path_components), jobname, '{timestamp}', 'tiles'))",
+      description: "Final file path of where render output will be saved"
+    },
+
+    // Automatically evaluated settings:
+    {
+      key: "blendfile",
+      type: "string",
+      required: true,
+      description: "Path of the Blend file to render",
+      visible: "web"
+    },
+    {
+      key: "format",
+      type: "string",
+      required: true,
+      eval: "C.scene.render.image_settings.file_format",
+      visible: "web"
+    },
+    {
+      key: "image_file_extension",
+      type: "string",
+      required: true,
+      eval: "C.scene.render.file_extension",
+      visible: "hidden",
+      description: "File extension used when rendering images"
+    },
+    {
+      key: "resolution_x",
+      type: "int32",
+      required: true,
+      eval: "C.scene.render.resolution_x",
+      visible: "hidden",
+      description: "Resolution X"
+    },
+    {
+      key: "resolution_y",
+      type: "int32",
+      required: true,
+      eval: "C.scene.render.resolution_y",
+      visible: "hidden",
+      description: "Resolution Y"
+    },
+    {
+      key: "resolution_scale",
+      type: "int32",
+      required: true,
+      eval: "C.scene.render.resolution_percentage",
+      visible: "hidden",
+      description: "Resolution scale"
+    }
+  ]
+};
+
+function compileJob(job) {
+  print("Single Image Render job submitted");
+  print("job: ", job);
+
+  const settings = job.settings;
+  const renderOutput = renderOutputPath(job);
+
+  if (settings.resolution_scale !== 100) {
+    throw "Flamenco currently does not support rendering with a resolution scale other than 100%";
+  }
+
+  // Make sure that when the job is investigated later, it shows the
+  // actually-used render output:
+  settings.render_output_path = renderOutput;
+
+  const renderDir = path.dirname(renderOutput);
+  const renderTasks = authorRenderTasks(settings, renderDir, renderOutput);
+  const mergeTask = authorMergeTask(settings, renderDir);
+
+  for (const rt of renderTasks) {
+    job.addTask(rt);
+  }
+  if (mergeTask) {
+    // If there is a merge task, all other tasks have to be done first.
+    for (const rt of renderTasks) {
+      mergeTask.addDependency(rt);
+    }
+    job.addTask(mergeTask);
+  }
+}
+
+// Do field replacement on the render output path.
+function renderOutputPath(job) {
+  let path = job.settings.render_output_path;
+  if (!path) {
+    throw "no render_output_path setting!";
+  }
+  return path.replace(/{([^}]+)}/g, (match, group0) => {
+    switch (group0) {
+      case "timestamp":
+        return formatTimestampLocal(job.created);
+      default:
+        return match;
+    }
+  });
+}
+
+// Calculate the borders for the tiles
+// Does not take into account the overscan
+function calcBorders(tileSizeX, tileSizeY, width, height) {
+  let borders = [];
+  for (let y = 0; y < height; y += tileSizeY) {
+    for (let x = 0; x < width; x += tileSizeX) {
+      borders.push([x, y, Math.min(x + tileSizeX, width), Math.min(y + tileSizeY, height)]);
+    }
+  }
+  print("borders: ", borders);
+  return borders;
+}
+
+function authorRenderTasks(settings, renderDir, renderOutput) {
+  print("authorRenderTasks(", renderDir, renderOutput, ")");
+  let renderTasks = [];
+  let borders = calcBorders(settings.tile_size_x, settings.tile_size_y, settings.resolution_x, settings.resolution_y);
+  for (let border of borders) {
+    const task = author.Task(`render-${border[0]}-${border[1]}`, "blender");
+    // Overscan is calculated in this manner to avoid rendering outside the image resolution
+    let pythonExpr = `import bpy
+
+scene = bpy.context.scene
+render = scene.render
+render.image_settings.file_format = 'OPEN_EXR_MULTILAYER'
+render.use_compositing = False
+render.use_stamp = False
+overscan = 16
+
+render.border_min_x = max(${border[0]} - overscan, 0) / ${settings.resolution_x}
+render.border_min_y = max(${border[1]} - overscan, 0) / ${settings.resolution_y}
+render.border_max_x = min(${border[2]} + overscan, ${settings.resolution_x}) / ${settings.resolution_x}
+render.border_max_y = min(${border[3]} + overscan, ${settings.resolution_x}) / ${settings.resolution_y}
+render.use_border = True
+render.use_crop_to_border = True
+bpy.ops.render.render(write_still=True)`
+    const command = author.Command("blender-render", {
+      exe: "{blender}",
+      exeArgs: "{blenderArgs}",
+      argsBefore: [],
+      blendfile: settings.blendfile,
+      args: [
+        "--render-output", path.join(renderDir, path.basename(renderOutput), border[0] + "-" + border[1] + "-" + border[2] + "-" + border[3]),
+        "--render-format", settings.format,
+        "--python-expr", pythonExpr
+      ]
+    });
+    task.addCommand(command);
+    renderTasks.push(task);
+  }
+  return renderTasks;
+}
+
+function authorMergeTask(settings, renderDir, renderOutput) {
+  print("authorMergeTask(", renderDir, ")");
+  const task = author.Task("merge", "blender");
+  // Burning metadata into the image is done by the compositor for the entire merged image
+  // The overall logic of the merge is as follows:
+  // 1. Find out the Render Layers node and to which socket it is connected
+  // 2. Load image files from the tiles directory.
+  //    Their correct position is determined by their filename.
+  // 3. Create a node tree that scales, translates and adds the tiles together.
+  //    A simple version of the node tree is linked here:
+  //    https://devtalk.blender.org/uploads/default/original/3X/f/0/f047f221c70955b32e4b455e53453c5df716079e.jpeg
+  // 4. The final image is then fed into the socket the Render Layers node was connected to.
+  //    This allows the compositing to work as if the image was rendered in one go.
+  let pythonExpr = `import bpy
+
+render = bpy.context.scene.render
+render.resolution_x = ${settings.resolution_x}
+render.resolution_y = ${settings.resolution_y}
+bpy.context.scene.use_nodes = True
+render.use_compositing = True
+render.use_stamp = True
+node_tree = bpy.context.scene.node_tree
+overscan = 16
+
+render_layers_node = None
+for node in node_tree.nodes:
+    if node.type == 'R_LAYERS':
+        feed_in_input = node.outputs[0]
+        render_layers_node = node
+        break
+for link in node_tree.links:
+    if feed_in_input is not None and link.from_socket == feed_in_input:
+        feed_in_output = link.to_socket
+        break
+
+from pathlib import Path
+
+root = Path("${path.join(renderDir, path.basename(renderOutput))}/tiles")
+image_files = [f for f in root.iterdir() if f.is_file()]
+
+separate_nodes = []
+first_crop_node = None
+translate_nodes = []
+min_width = min([int(f.stem.split('-')[2]) - int(f.stem.split('-')[0]) for f in image_files])
+min_height = min([int(f.stem.split('-')[3]) - int(f.stem.split('-')[1]) for f in image_files])
+for i, image_file in enumerate(image_files):
+    image_node = node_tree.nodes.new('CompositorNodeImage')
+    image_node.image = bpy.data.images.load(str(root / image_file.name))
+
+    crop_node = node_tree.nodes.new('CompositorNodeCrop')
+    crop_node.use_crop_size = True
+    left, top, right, bottom = image_file.stem.split('-')
+    actual_width = int(right) - int(left)
+    actual_height = int(bottom) - int(top)
+    if left == '0':
+        crop_node.min_x = 0
+        crop_node.max_x = actual_width
+    else:
+        crop_node.min_x = overscan
+        crop_node.max_x = actual_width + overscan
+    if top == '0':
+        crop_node.max_y = 0
+        crop_node.min_y = actual_height
+    else:
+        crop_node.max_y = overscan
+        crop_node.min_y = actual_height + overscan
+    if i == 0:
+        first_crop_node = crop_node
+
+    translate_node = node_tree.nodes.new('CompositorNodeTranslate')
+    # translate_node.use_relative = True
+    translate_node.inputs[1].default_value = float(left) + (actual_width - ${settings.resolution_x}) / 2
+    translate_node.inputs[2].default_value = float(top) + (actual_height - ${settings.resolution_y}) / 2
+    translate_nodes.append(translate_node)
+
+    separate_node = node_tree.nodes.new('CompositorNodeSeparateColor')
+    separate_nodes.append(separate_node)
+
+    node_tree.links.new(image_node.outputs[0], crop_node.inputs[0])
+    node_tree.links.new(crop_node.outputs[0], translate_node.inputs[0])
+    node_tree.links.new(translate_node.outputs[0], separate_node.inputs[0])
+
+scale_node = node_tree.nodes.new('CompositorNodeScale')
+scale_node.space = 'RELATIVE'
+scale_node.inputs[1].default_value = ${settings.resolution_x} / min_width
+scale_node.inputs[2].default_value = ${settings.resolution_y} / min_height
+node_tree.links.new(first_crop_node.outputs[0], scale_node.inputs[0])
+mix_node = node_tree.nodes.new('CompositorNodeMixRGB')
+mix_node.blend_type = 'MIX'
+mix_node.inputs[0].default_value = 0.0
+mix_node.inputs[1].default_value = (0, 0, 0, 1)
+node_tree.links.new(scale_node.outputs[0], mix_node.inputs[2])
+
+mix_adds = [node_tree.nodes.new('CompositorNodeMixRGB') for _ in range(len(separate_nodes))]
+math_adds = [node_tree.nodes.new('CompositorNodeMath') for _ in range(len(separate_nodes))]
+for i, mix_add in enumerate(mix_adds):
+    mix_add.blend_type = 'ADD'
+    if i == 0:
+        node_tree.links.new(mix_node.outputs[0], mix_add.inputs[1])
+    else:
+        node_tree.links.new(mix_adds[i - 1].outputs[0], mix_add.inputs[1])
+    node_tree.links.new(translate_nodes[i].outputs[0], mix_add.inputs[2])
+
+for i, math_add in enumerate(math_adds):
+    math_add.operation = 'ADD'
+    if i == 0:
+        node_tree.links.new(mix_node.outputs[0], math_add.inputs[0])
+    else:
+        node_tree.links.new(math_adds[i - 1].outputs[0], math_add.inputs[0])
+    node_tree.links.new(separate_nodes[i - 1].outputs[3], math_add.inputs[1])
+
+set_alpha_node = node_tree.nodes.new('CompositorNodeSetAlpha')
+set_alpha_node.mode = 'REPLACE_ALPHA'
+node_tree.links.new(mix_adds[-1].outputs[0], set_alpha_node.inputs[0])
+node_tree.links.new(math_adds[-1].outputs[0], set_alpha_node.inputs[1])
+if feed_in_input is not None:
+    node_tree.links.new(set_alpha_node.outputs[0], feed_in_output)
+else:
+    raise Exception('No Render Layers Node found. Currently only supported with a Render Layers Node in the Compositor.')
+
+node_tree.nodes.remove(render_layers_node)
+bpy.ops.render.render(write_still=True)`
+
+  const command = author.Command("blender-render", {
+    exe: "{blender}",
+    exeArgs: "{blenderArgs}",
+    argsBefore: [],
+    blendfile: settings.blendfile,
+    args: [
+      "--render-output", path.join(renderDir, path.basename(renderOutput), "merged"),
+      "--render-format", settings.format,
+      "--python-expr", pythonExpr
+    ]
+  });
+  task.addCommand(command);
+  return task;
+}
--- a/internal/manager/persistence/jobs.go
+++ b/internal/manager/persistence/jobs.go
@ -359,6 +359,18 @@ func (db *DB) FetchJob(ctx context.Context, jobUUID string) (*Job, error) {
 	if err != nil {
 		return nil, err
 	}
+
+	if sqlcJob.WorkerTagID.Valid {
+		workerTag, err := fetchWorkerTagByID(db.gormDB, uint(sqlcJob.WorkerTagID.Int64))
+		switch {
+		case errors.Is(err, sql.ErrNoRows):
+			return nil, ErrWorkerTagNotFound
+		case err != nil:
+			return nil, workerTagError(err, "fetching worker tag of job")
+		}
+		gormJob.WorkerTag = workerTag
+	}
+
 	return &gormJob, nil
 }

--- a/internal/manager/persistence/jobs_blocklist.go
+++ b/internal/manager/persistence/jobs_blocklist.go
@ -7,7 +7,7 @@ import (
 	"math"
 	"time"

-	"gorm.io/gorm/clause"
+	"projects.blender.org/studio/flamenco/internal/manager/persistence/sqlc"
 )

 // JobBlock keeps track of which Worker is not allowed to run which task type on which job.
@ -28,66 +28,76 @@ type JobBlock struct {

 // AddWorkerToJobBlocklist prevents this Worker of getting any task, of this type, on this job, from the task scheduler.
 func (db *DB) AddWorkerToJobBlocklist(ctx context.Context, job *Job, worker *Worker, taskType string) error {
-	entry := JobBlock{
-		Job:      job,
-		Worker:   worker,
-		TaskType: taskType,
+	if job.ID == 0 {
+		panic("Cannot add worker to job blocklist with zero job ID")
 	}
-	tx := db.gormDB.WithContext(ctx).
-		Clauses(clause.OnConflict{DoNothing: true}).
-		Create(&entry)
-	return tx.Error
+	if worker.ID == 0 {
+		panic("Cannot add worker to job blocklist with zero worker ID")
+	}
+	if taskType == "" {
+		panic("Cannot add worker to job blocklist with empty task type")
+	}
+
+	queries, err := db.queries()
+	if err != nil {
+		return err
+	}
+
+	return queries.AddWorkerToJobBlocklist(ctx, sqlc.AddWorkerToJobBlocklistParams{
+		CreatedAt: db.now().Time,
+		JobID:     int64(job.ID),
+		WorkerID:  int64(worker.ID),
+		TaskType:  taskType,
+	})
 }

+// FetchJobBlocklist fetches the blocklist for the given job.
+// Workers are fetched too, and embedded in the returned list.
 func (db *DB) FetchJobBlocklist(ctx context.Context, jobUUID string) ([]JobBlock, error) {
-	entries := []JobBlock{}
+	queries, err := db.queries()
+	if err != nil {
+		return nil, err
+	}

-	tx := db.gormDB.WithContext(ctx).
-		Model(JobBlock{}).
-		Joins("inner join jobs on jobs.id = job_blocks.job_id").
-		Joins("Worker").
-		Where("jobs.uuid = ?", jobUUID).
-		Order("Worker.name").
-		Scan(&entries)
-	return entries, tx.Error
+	rows, err := queries.FetchJobBlocklist(ctx, jobUUID)
+	if err != nil {
+		return nil, err
+	}
+
+	entries := make([]JobBlock, len(rows))
+	for idx, row := range rows {
+		entries[idx].ID = uint(row.JobBlock.ID)
+		entries[idx].CreatedAt = row.JobBlock.CreatedAt
+		entries[idx].TaskType = row.JobBlock.TaskType
+		entries[idx].JobID = uint(row.JobBlock.JobID)
+		entries[idx].WorkerID = uint(row.JobBlock.WorkerID)
+
+		worker := convertSqlcWorker(row.Worker)
+		entries[idx].Worker = &worker
+	}
+
+	return entries, nil
 }

 // ClearJobBlocklist removes the entire blocklist of this job.
 func (db *DB) ClearJobBlocklist(ctx context.Context, job *Job) error {
-	tx := db.gormDB.WithContext(ctx).
-		Where("job_id = ?", job.ID).
-		Delete(JobBlock{})
-	return tx.Error
+	queries, err := db.queries()
+	if err != nil {
+		return err
+	}
+	return queries.ClearJobBlocklist(ctx, job.UUID)
 }

 func (db *DB) RemoveFromJobBlocklist(ctx context.Context, jobUUID, workerUUID, taskType string) error {
-	// Find the job ID.
-	job := Job{}
-	tx := db.gormDB.WithContext(ctx).
-		Select("id").
-		Where("uuid = ?", jobUUID).
-		Find(&job)
-	if tx.Error != nil {
-		return jobError(tx.Error, "fetching job with uuid=%q", jobUUID)
+	queries, err := db.queries()
+	if err != nil {
+		return err
 	}
-
-	// Find the worker ID.
-	worker := Worker{}
-	tx = db.gormDB.WithContext(ctx).
-		Select("id").
-		Where("uuid = ?", workerUUID).
-		Find(&worker)
-	if tx.Error != nil {
-		return workerError(tx.Error, "fetching worker with uuid=%q", workerUUID)
-	}
-
-	// Remove the blocklist entry.
-	tx = db.gormDB.WithContext(ctx).
-		Where("job_id = ?", job.ID).
-		Where("worker_id = ?", worker.ID).
-		Where("task_type = ?", taskType).
-		Delete(JobBlock{})
-	return tx.Error
+	return queries.RemoveFromJobBlocklist(ctx, sqlc.RemoveFromJobBlocklistParams{
+		JobUUID:    jobUUID,
+		WorkerUUID: workerUUID,
+		TaskType:   taskType,
+	})
 }

 // WorkersLeftToRun returns a set of worker UUIDs that can run tasks of the given type on the given job.
--- a/internal/manager/persistence/jobs_test.go
+++ b/internal/manager/persistence/jobs_test.go
@ -75,6 +75,38 @@ func TestStoreAuthoredJobWithShamanCheckoutID(t *testing.T) {
 	assert.Equal(t, job.Storage.ShamanCheckoutID, fetchedJob.Storage.ShamanCheckoutID)
 }

+func TestStoreAuthoredJobWithWorkerTag(t *testing.T) {
+	ctx, cancel, db := persistenceTestFixtures(1 * time.Second)
+	defer cancel()
+
+	workerTagUUID := "daa811ac-6861-4004-8748-7700aebc244c"
+	require.NoError(t, db.CreateWorkerTag(ctx, &WorkerTag{
+		UUID:        workerTagUUID,
+		Name:        "🐈",
+		Description: "Mrieuw",
+	}))
+	workerTag, err := db.FetchWorkerTag(ctx, workerTagUUID)
+	require.NoError(t, err)
+
+	job := createTestAuthoredJobWithTasks()
+	job.WorkerTagUUID = workerTagUUID
+
+	err = db.StoreAuthoredJob(ctx, job)
+	require.NoError(t, err)
+
+	fetchedJob, err := db.FetchJob(ctx, job.JobID)
+	require.NoError(t, err)
+	require.NotNil(t, fetchedJob)
+
+	require.NotNil(t, fetchedJob.WorkerTagID)
+	assert.Equal(t, *fetchedJob.WorkerTagID, workerTag.ID)
+
+	require.NotNil(t, fetchedJob.WorkerTag)
+	assert.Equal(t, fetchedJob.WorkerTag.Name, workerTag.Name)
+	assert.Equal(t, fetchedJob.WorkerTag.Description, workerTag.Description)
+	assert.Equal(t, fetchedJob.WorkerTag.UUID, workerTagUUID)
+}
+
 func TestFetchTaskJobUUID(t *testing.T) {
 	ctx, cancel, db := persistenceTestFixtures(1 * time.Second)
 	defer cancel()
--- a/internal/manager/persistence/sqlc/query_jobs.sql
+++ b/internal/manager/persistence/sqlc/query_jobs.sql
@ -244,3 +244,28 @@ ON CONFLICT DO UPDATE
 -- name: GetLastRenderedJobUUID :one
 SELECT uuid FROM jobs
 INNER JOIN last_rendereds LR ON jobs.id = LR.job_id;
+
+-- name: AddWorkerToJobBlocklist :exec
+-- Add a worker to a job's blocklist.
+INSERT INTO job_blocks (created_at, job_id, worker_id, task_type)
+VALUES (@created_at, @job_id, @worker_id, @task_type)
+ON CONFLICT DO NOTHING;
+
+-- name: FetchJobBlocklist :many
+SELECT sqlc.embed(job_blocks), sqlc.embed(workers)
+FROM job_blocks
+INNER JOIN jobs ON jobs.id = job_blocks.job_id
+INNER JOIN workers on workers.id = job_blocks.worker_id
+WHERE jobs.uuid = @jobuuid
+ORDER BY workers.name;
+
+-- name: ClearJobBlocklist :exec
+DELETE FROM job_blocks
+WHERE job_id in (SELECT jobs.id FROM jobs WHERE jobs.uuid=@jobuuid);
+
+-- name: RemoveFromJobBlocklist :exec
+DELETE FROM job_blocks
+WHERE
+    job_blocks.job_id in (SELECT jobs.id FROM jobs WHERE jobs.uuid=@jobuuid)
+AND job_blocks.worker_id in (SELECT workers.id FROM workers WHERE workers.uuid=@workeruuid)
+AND job_blocks.task_type = @task_type;
--- a/internal/manager/persistence/sqlc/query_jobs.sql.go
+++ b/internal/manager/persistence/sqlc/query_jobs.sql.go
@ -13,6 +13,30 @@ import (
 	"time"
 )

+const addWorkerToJobBlocklist = `-- name: AddWorkerToJobBlocklist :exec
+INSERT INTO job_blocks (created_at, job_id, worker_id, task_type)
+VALUES (?1, ?2, ?3, ?4)
+ON CONFLICT DO NOTHING
+`
+
+type AddWorkerToJobBlocklistParams struct {
+	CreatedAt time.Time
+	JobID     int64
+	WorkerID  int64
+	TaskType  string
+}
+
+// Add a worker to a job's blocklist.
+func (q *Queries) AddWorkerToJobBlocklist(ctx context.Context, arg AddWorkerToJobBlocklistParams) error {
+	_, err := q.db.ExecContext(ctx, addWorkerToJobBlocklist,
+		arg.CreatedAt,
+		arg.JobID,
+		arg.WorkerID,
+		arg.TaskType,
+	)
+	return err
+}
+
 const addWorkerToTaskFailedList = `-- name: AddWorkerToTaskFailedList :exec
 INSERT INTO task_failures (created_at, task_id, worker_id)
 VALUES (?1, ?2, ?3)
@ -50,6 +74,16 @@ func (q *Queries) ClearFailureListOfTask(ctx context.Context, taskID int64) erro
 	return err
 }

+const clearJobBlocklist = `-- name: ClearJobBlocklist :exec
+DELETE FROM job_blocks
+WHERE job_id in (SELECT jobs.id FROM jobs WHERE jobs.uuid=?1)
+`
+
+func (q *Queries) ClearJobBlocklist(ctx context.Context, jobuuid string) error {
+	_, err := q.db.ExecContext(ctx, clearJobBlocklist, jobuuid)
+	return err
+}
+
 const countWorkersFailingTask = `-- name: CountWorkersFailingTask :one
 SELECT count(*) as num_failed FROM task_failures
 WHERE task_id=?1
@ -217,6 +251,65 @@ func (q *Queries) FetchJob(ctx context.Context, uuid string) (Job, error) {
 	return i, err
 }

+const fetchJobBlocklist = `-- name: FetchJobBlocklist :many
+SELECT job_blocks.id, job_blocks.created_at, job_blocks.job_id, job_blocks.worker_id, job_blocks.task_type, workers.id, workers.created_at, workers.updated_at, workers.uuid, workers.secret, workers.name, workers.address, workers.platform, workers.software, workers.status, workers.last_seen_at, workers.status_requested, workers.lazy_status_request, workers.supported_task_types, workers.deleted_at, workers.can_restart
+FROM job_blocks
+INNER JOIN jobs ON jobs.id = job_blocks.job_id
+INNER JOIN workers on workers.id = job_blocks.worker_id
+WHERE jobs.uuid = ?1
+ORDER BY workers.name
+`
+
+type FetchJobBlocklistRow struct {
+	JobBlock JobBlock
+	Worker   Worker
+}
+
+func (q *Queries) FetchJobBlocklist(ctx context.Context, jobuuid string) ([]FetchJobBlocklistRow, error) {
+	rows, err := q.db.QueryContext(ctx, fetchJobBlocklist, jobuuid)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []FetchJobBlocklistRow
+	for rows.Next() {
+		var i FetchJobBlocklistRow
+		if err := rows.Scan(
+			&i.JobBlock.ID,
+			&i.JobBlock.CreatedAt,
+			&i.JobBlock.JobID,
+			&i.JobBlock.WorkerID,
+			&i.JobBlock.TaskType,
+			&i.Worker.ID,
+			&i.Worker.CreatedAt,
+			&i.Worker.UpdatedAt,
+			&i.Worker.UUID,
+			&i.Worker.Secret,
+			&i.Worker.Name,
+			&i.Worker.Address,
+			&i.Worker.Platform,
+			&i.Worker.Software,
+			&i.Worker.Status,
+			&i.Worker.LastSeenAt,
+			&i.Worker.StatusRequested,
+			&i.Worker.LazyStatusRequest,
+			&i.Worker.SupportedTaskTypes,
+			&i.Worker.DeletedAt,
+			&i.Worker.CanRestart,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
 const fetchJobByID = `-- name: FetchJobByID :one
 SELECT id, created_at, updated_at, uuid, name, job_type, priority, status, activity, settings, metadata, delete_requested_at, storage_shaman_checkout_id, worker_tag_id FROM jobs
 WHERE id = ? LIMIT 1
@ -758,6 +851,25 @@ func (q *Queries) JobCountTasksInStatus(ctx context.Context, arg JobCountTasksIn
 	return num_tasks, err
 }

+const removeFromJobBlocklist = `-- name: RemoveFromJobBlocklist :exec
+DELETE FROM job_blocks
+WHERE
+    job_blocks.job_id in (SELECT jobs.id FROM jobs WHERE jobs.uuid=?1)
+AND job_blocks.worker_id in (SELECT workers.id FROM workers WHERE workers.uuid=?2)
+AND job_blocks.task_type = ?3
+`
+
+type RemoveFromJobBlocklistParams struct {
+	JobUUID    string
+	WorkerUUID string
+	TaskType   string
+}
+
+func (q *Queries) RemoveFromJobBlocklist(ctx context.Context, arg RemoveFromJobBlocklistParams) error {
+	_, err := q.db.ExecContext(ctx, removeFromJobBlocklist, arg.JobUUID, arg.WorkerUUID, arg.TaskType)
+	return err
+}
+
 const requestJobDeletion = `-- name: RequestJobDeletion :exec
 UPDATE jobs SET
  updated_at = ?1,
--- a/internal/manager/persistence/worker_tag.go
+++ b/internal/manager/persistence/worker_tag.go
@ -53,6 +53,16 @@ func fetchWorkerTag(gormDB *gorm.DB, uuid string) (*WorkerTag, error) {
 	return &w, nil
 }

+// fetchWorkerTagByID fetches the worker tag using the given database instance.
+func fetchWorkerTagByID(gormDB *gorm.DB, id uint) (*WorkerTag, error) {
+	w := WorkerTag{}
+	tx := gormDB.First(&w, "id = ?", id)
+	if tx.Error != nil {
+		return nil, workerTagError(tx.Error, "fetching worker tag")
+	}
+	return &w, nil
+}
+
 func (db *DB) SaveWorkerTag(ctx context.Context, tag *WorkerTag) error {
 	if err := db.gormDB.WithContext(ctx).Save(tag).Error; err != nil {
 		return workerTagError(err, "saving worker tag")
--- a/internal/worker/command_ffmpeg.go
+++ b/internal/worker/command_ffmpeg.go
@ -25,7 +25,7 @@ import (
 	"projects.blender.org/studio/flamenco/pkg/crosspath"
 )

-type CreateVideoParams struct {
+type FramesToVideoParams struct {
 	exe        string   // Executable path defined by the Manager.
 	exeArgs    string   // Its CLI parameters defined by the Manager.
 	fps        float64  // Frames per second of the video file.
@ -101,9 +101,9 @@ func (ce *CommandExecutor) cmdFramesToVideoExeCommand(
 	return execCmd, cleanup, nil
 }

-func cmdFramesToVideoParams(logger zerolog.Logger, cmd api.Command) (CreateVideoParams, error) {
+func cmdFramesToVideoParams(logger zerolog.Logger, cmd api.Command) (FramesToVideoParams, error) {
 	var (
-		parameters CreateVideoParams
+		parameters FramesToVideoParams
 		ok         bool
 	)

@ -172,7 +172,7 @@ func cmdFramesToVideoParams(logger zerolog.Logger, cmd api.Command) (CreateVideo

 // getInputGlob constructs CLI arguments for FFmpeg input file globbing.
 // The 2nd return value is a cleanup function.
-func (p *CreateVideoParams) getInputGlob() ([]string, func(), error) {
+func (p *FramesToVideoParams) getInputGlob() ([]string, func(), error) {
 	if runtime.GOOS == "windows" {
 		return createIndexFile(p.inputGlob, p.fps)
 	}
--- a/pkg/shaman/checkout/checkout_test.go
+++ b/pkg/shaman/checkout/checkout_test.go
@ -7,6 +7,7 @@ import (
 	"testing"

 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"projects.blender.org/studio/flamenco/pkg/api"
 	"projects.blender.org/studio/flamenco/pkg/shaman/filestore"
 	"projects.blender.org/studio/flamenco/pkg/shaman/testsupport"
@ -43,20 +44,33 @@ func TestCheckout(t *testing.T) {
 	assert.FileExists(t, filepath.Join(coPath, "httpstuff.py"))
 	assert.FileExists(t, filepath.Join(coPath, "много ликова.py"))

-	storePath := manager.fileStore.StoragePath()
-	assertLinksTo(t, filepath.Join(coPath, "subdir", "replacer.py"),
-		filepath.Join(storePath, "59", "0c148428d5c35fab3ebad2f3365bb469ab9c531b60831f3e826c472027a0b9", "3367.blob"))
-	assertLinksTo(t, filepath.Join(coPath, "feed.py"),
-		filepath.Join(storePath, "80", "b749c27b2fef7255e7e7b3c2029b03b31299c75ff1f1c72732081c70a713a3", "7488.blob"))
-	assertLinksTo(t, filepath.Join(coPath, "httpstuff.py"),
-		filepath.Join(storePath, "91", "4853599dd2c351ab7b82b219aae6e527e51518a667f0ff32244b0c94c75688", "486.blob"))
-	assertLinksTo(t, filepath.Join(coPath, "много ликова.py"),
-		filepath.Join(storePath, "d6", "fc7289b5196cc96748ea72f882a22c39b8833b457fe854ef4c03a01f5db0d3", "7217.blob"))
+	storePath, err := filepath.Rel(
+		manager.checkoutBasePath,
+		manager.fileStore.StoragePath(),
+	)
+	require.NoError(t, err)
+	assertLinksTo(t,
+		// Two extra '..' for 'á hausinn á þér/subdir'.
+		filepath.Join("..", "..", storePath, "59", "0c148428d5c35fab3ebad2f3365bb469ab9c531b60831f3e826c472027a0b9", "3367.blob"),
+		filepath.Join(coPath, "subdir", "replacer.py"),
+	)
+	assertLinksTo(t,
+		filepath.Join("..", storePath, "80", "b749c27b2fef7255e7e7b3c2029b03b31299c75ff1f1c72732081c70a713a3", "7488.blob"),
+		filepath.Join(coPath, "feed.py"),
+	)
+	assertLinksTo(t,
+		filepath.Join("..", storePath, "91", "4853599dd2c351ab7b82b219aae6e527e51518a667f0ff32244b0c94c75688", "486.blob"),
+		filepath.Join(coPath, "httpstuff.py"),
+	)
+	assertLinksTo(t,
+		filepath.Join("..", storePath, "d6", "fc7289b5196cc96748ea72f882a22c39b8833b457fe854ef4c03a01f5db0d3", "7217.blob"),
+		filepath.Join(coPath, "много ликова.py"),
+	)
 }

-func assertLinksTo(t *testing.T, linkPath, expectedTarget string) {
+func assertLinksTo(t *testing.T, expectedTarget, linkPath string) {
 	actualTarget, err := os.Readlink(linkPath)
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	assert.Equal(t, expectedTarget, actualTarget)
 }

--- a/pkg/shaman/checkout/manager.go
+++ b/pkg/shaman/checkout/manager.go
@ -202,22 +202,46 @@ func (m *Manager) EraseCheckout(checkoutID string) error {
 // It does *not* do any validation of the validity of the paths!
 func (m *Manager) SymlinkToCheckout(blobPath, checkoutPath, symlinkRelativePath string) error {
 	symlinkPath := filepath.Join(checkoutPath, symlinkRelativePath)
-	logger := log.With().
-		Str("blobPath", blobPath).
-		Str("symlinkPath", symlinkPath).
-		Logger()
+	logger := log.With().Str("symlinkPath", symlinkPath).Logger()

-	blobPath, err := filepath.Abs(blobPath)
+	blobAbsolute, err := filepath.Abs(blobPath)
 	if err != nil {
-		logger.Error().Err(err).Msg("shaman: unable to make blobPath absolute")
+		logger.Error().
+			Str("blobPath", blobPath).
+			Err(err).Msg("shaman: unable to make blobPath absolute")
 		return err
 	}
+	if blobAbsolute != blobPath {
+		logger.Trace().
+			Str("input", blobPath).
+			Str("absolute", blobAbsolute).
+			Msg("shaman: made blobpath absolute")
+	}

+	// Try and make blobAbsolute relative to the symlink target directory, so that
+	// mounting the symlinked storage at a different prefix works as well.
+	symlinkDir := filepath.Dir(symlinkPath)
+	blobRelativeToCheckout, err := filepath.Rel(symlinkDir, blobAbsolute)
+	if err != nil {
+		logger.Warn().
+			Str("blobPath", blobAbsolute).
+			AnErr("cause", err).
+			Msg("shaman: unable to make blobPath relative, will use absolute path")
+		blobRelativeToCheckout = blobAbsolute
+	}
+
+	logger.Trace().
+		Str("absolute", blobAbsolute).
+		Str("relative", blobRelativeToCheckout).
+		Str("symlinkDir", symlinkDir).
+		Msg("shaman: made blobpath relative")
+
+	logger = logger.With().Str("blobPath", blobRelativeToCheckout).Logger()
 	logger.Debug().Msg("shaman: creating symlink")

 	// This is expected to fail sometimes, because we don't create parent directories yet.
 	// We only create those when we get a failure from symlinking.
-	err = os.Symlink(blobPath, symlinkPath)
+	err = os.Symlink(blobRelativeToCheckout, symlinkPath)
 	switch {
 	case err == nil:
 		return nil
@ -232,7 +256,7 @@ func (m *Manager) SymlinkToCheckout(blobPath, checkoutPath, symlinkRelativePath
 				Msg("shaman: unable to create symlink as it already exists, but also it cannot be read")
 			return err
 		}
-		if linkTarget != blobPath {
+		if linkTarget != blobRelativeToCheckout {
 			logger.Error().
 				AnErr("symlinkError", err).
 				Str("alreadyLinkedFrom", linkTarget).
@ -251,7 +275,7 @@ func (m *Manager) SymlinkToCheckout(blobPath, checkoutPath, symlinkRelativePath
 			logger.Error().Err(err).Msg("shaman: unable to create parent directory")
 			return err
 		}
-		if err := os.Symlink(blobPath, symlinkPath); err != nil {
+		if err := os.Symlink(blobRelativeToCheckout, symlinkPath); err != nil {
 			logger.Error().Err(err).Msg("shaman: unable to create symlink, after creating parent directory")
 			return err
 		}
@ -263,7 +287,7 @@ func (m *Manager) SymlinkToCheckout(blobPath, checkoutPath, symlinkRelativePath
 	// Change the modification time of the blob to mark it as 'referenced' just now.
 	m.wg.Add(1)
 	go func() {
-		if err := touchFile(blobPath); err != nil {
+		if err := touchFile(blobAbsolute); err != nil {
 			logger.Warn().Err(err).Msg("shaman: unable to touch blob path")
 		}
 		m.wg.Done()
--- a/pkg/shaman/checkout/manager_test.go
+++ b/pkg/shaman/checkout/manager_test.go
@ -24,15 +24,18 @@ package checkout

 import (
 	"context"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
 	"testing"
 	"time"

+	"github.com/mattn/go-colorable"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+
 	"projects.blender.org/studio/flamenco/pkg/api"
 	"projects.blender.org/studio/flamenco/pkg/shaman/config"
 	"projects.blender.org/studio/flamenco/pkg/shaman/filestore"
@ -40,6 +43,9 @@ import (
 )

 func createTestManager() (*Manager, func()) {
+	output := zerolog.ConsoleWriter{Out: colorable.NewColorableStdout(), TimeFormat: time.RFC3339}
+	log.Logger = log.Output(output)
+
 	conf, confCleanup := config.CreateTestConfig()
 	fileStore := filestore.New(conf)
 	manager := NewManager(conf, fileStore)
@ -53,36 +59,40 @@ func TestSymlinkToCheckout(t *testing.T) {
 	defer cleanup()

 	// Fake an older file.
-	blobPath := filepath.Join(manager.checkoutBasePath, "jemoeder.blob")
-	err := ioutil.WriteFile(blobPath, []byte("op je hoofd"), 0600)
-	assert.NoError(t, err)
+	blobPath := filepath.Join(manager.fileStore.StoragePath(), "opjehoofd.blob")
+	err := os.WriteFile(blobPath, []byte("op je hoofd"), 0600)
+	require.NoError(t, err)

 	wayBackWhen := time.Now().Add(-time.Hour * 24 * 100)
 	err = os.Chtimes(blobPath, wayBackWhen, wayBackWhen)
-	assert.NoError(t, err)
+	require.NoError(t, err)

-	symlinkRelativePath := "path/to/jemoeder.txt"
+	symlinkRelativePath := "path/to/opjehoofd.txt"
 	err = manager.SymlinkToCheckout(blobPath, manager.checkoutBasePath, symlinkRelativePath)
-	assert.NoError(t, err)
+	require.NoError(t, err)

 	err = manager.SymlinkToCheckout(blobPath, manager.checkoutBasePath, symlinkRelativePath)
-	assert.NoError(t, err, "symlinking a file twice should not be an issue")
+	require.NoError(t, err, "symlinking a file twice should not be an issue")

-	// Wait for touch() calls to be done.
+	// Wait for the manager to be done updating mtimes.
 	manager.wg.Wait()

 	// The blob should have been touched to indicate it was referenced just now.
 	stat, err := os.Stat(blobPath)
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	assert.True(t,
 		stat.ModTime().After(wayBackWhen),
 		"File must be touched (%v must be later than %v)", stat.ModTime(), wayBackWhen)

 	symlinkPath := filepath.Join(manager.checkoutBasePath, symlinkRelativePath)
 	stat, err = os.Lstat(symlinkPath)
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	assert.True(t, stat.Mode()&os.ModeType == os.ModeSymlink,
 		"%v should be a symlink", symlinkPath)
+
+	contents, err := os.ReadFile(symlinkPath)
+	require.NoError(t, err)
+	assert.Equal(t, string(contents), "op je hoofd")
 }

 func TestPrepareCheckout(t *testing.T) {
--- a/pkg/shaman/checkout/report_requirements_test.go
+++ b/pkg/shaman/checkout/report_requirements_test.go
@ -27,6 +27,7 @@ import (
 	"testing"

 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"projects.blender.org/studio/flamenco/pkg/api"
 )

@ -44,7 +45,7 @@ func TestReportRequirements(t *testing.T) {
 	}

 	response, err := manager.ReportRequirements(context.Background(), required)
-	assert.NoError(t, err)
+	require.NoError(t, err)

 	// We should not be required to upload the same file twice, so the duplicate
 	// should not be in the response.
--- a/pkg/shaman/cleanup_test.go
+++ b/pkg/shaman/cleanup_test.go
@ -23,7 +23,6 @@
 package shaman

 import (
-	"errors"
 	"fmt"
 	"io/fs"
 	"os"
@ -31,8 +30,12 @@ import (
 	"testing"
 	"time"

+	"github.com/mattn/go-colorable"
+	"github.com/rs/zerolog"
 	"github.com/rs/zerolog/log"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
 	"projects.blender.org/studio/flamenco/pkg/shaman/config"
 	"projects.blender.org/studio/flamenco/pkg/shaman/filestore"
 	"projects.blender.org/studio/flamenco/pkg/shaman/jwtauth"
@ -40,6 +43,9 @@ import (
 )

 func createTestShaman() (*Server, func()) {
+	output := zerolog.ConsoleWriter{Out: colorable.NewColorableStdout(), TimeFormat: time.RFC3339}
+	log.Logger = log.Output(output)
+
 	conf, confCleanup := config.CreateTestConfig()
 	shaman := NewServer(conf, jwtauth.AlwaysDeny{})
 	return shaman, confCleanup
@ -101,7 +107,7 @@ func TestGCFindOldFiles(t *testing.T) {
 	// Since all the links have just been created, nothing should be considered old.
 	ageThreshold := server.gcAgeThreshold()
 	old, err := server.gcFindOldFiles(ageThreshold, log.With().Str("test", "test").Logger())
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	assert.EqualValues(t, mtimeMap{}, old)

 	// Make some files old, they should show up in a scan.
@ -111,7 +117,7 @@ func TestGCFindOldFiles(t *testing.T) {
 	makeOld(server, expectOld, "stored/dc/89f15de821ad1df3e78f8ef455e653a2d1862f2eb3f5ee78aa4ca68eb6fb35/781.blob")

 	old, err = server.gcFindOldFiles(ageThreshold, log.With().Str("package", "shaman/test").Logger())
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	assert.EqualValues(t, expectOld, old)
 }

@ -151,18 +157,18 @@ func TestGCComponents(t *testing.T) {
 	// No symlinks created yet, so this should report all the files in oldFiles.
 	oldFiles := copymap(expectOld)
 	err := server.gcFilterLinkedFiles(server.config.CheckoutPath(), oldFiles, log.With().Str("package", "shaman/test").Logger(), nil)
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	assert.EqualValues(t, expectOld, oldFiles)

 	// Create some symlinks
 	checkoutInfo, err := server.checkoutMan.PrepareCheckout("checkoutID")
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	err = server.checkoutMan.SymlinkToCheckout(absPaths["3367.blob"], server.config.CheckoutPath(),
 		filepath.Join(checkoutInfo.RelativePath, "use-of-3367.blob"))
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	err = server.checkoutMan.SymlinkToCheckout(absPaths["781.blob"], extraCheckoutDir,
 		filepath.Join(checkoutInfo.RelativePath, "use-of-781.blob"))
-	assert.NoError(t, err)
+	require.NoError(t, err)

 	// There should only be two old file reported now.
 	expectRemovable := mtimeMap{
@ -173,17 +179,17 @@ func TestGCComponents(t *testing.T) {
 	stats := GCStats{}
 	err = server.gcFilterLinkedFiles(server.config.CheckoutPath(), oldFiles, log.With().Str("package", "shaman/test").Logger(), &stats)
 	assert.Equal(t, 1, stats.numSymlinksChecked) // 1 is in checkoutPath, the other in extraCheckoutDir
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	assert.Equal(t, len(expectRemovable)+1, len(oldFiles)) // one file is linked from the extra checkout dir
 	err = server.gcFilterLinkedFiles(extraCheckoutDir, oldFiles, log.With().Str("package", "shaman/test").Logger(), &stats)
 	assert.Equal(t, 2, stats.numSymlinksChecked) // 1 is in checkoutPath, the other in extraCheckoutDir
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	assert.EqualValues(t, expectRemovable, oldFiles)

 	// Touching a file before requesting deletion should not delete it.
 	now := time.Now()
 	err = os.Chtimes(absPaths["6001.blob"], now, now)
-	assert.NoError(t, err)
+	require.NoError(t, err)

 	// Running the garbage collector should only remove that one unused and untouched file.
 	assert.FileExists(t, absPaths["6001.blob"], "file should exist before GC")
@ -198,7 +204,7 @@ func TestGCComponents(t *testing.T) {
 	assert.FileExists(t, absPaths["6001.blob"], "file should exist after GC")
 	assert.FileExists(t, absPaths["781.blob"], "file should exist after GC")
 	_, err = os.Stat(absPaths["7488.blob"])
-	assert.True(t, errors.Is(err, fs.ErrNotExist), "file %s should NOT exist after GC", absPaths["7488.blob"])
+	assert.ErrorIs(t, err, fs.ErrNotExist, "file %s should NOT exist after GC", absPaths["7488.blob"])
 }

 // Test of the high-level GCStorage() function.
@ -228,13 +234,13 @@ func TestGarbageCollect(t *testing.T) {

 	// Create some symlinks
 	checkoutInfo, err := server.checkoutMan.PrepareCheckout("checkoutID")
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	err = server.checkoutMan.SymlinkToCheckout(absPaths["3367.blob"], server.config.CheckoutPath(),
 		filepath.Join(checkoutInfo.RelativePath, "use-of-3367.blob"))
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	err = server.checkoutMan.SymlinkToCheckout(absPaths["781.blob"], extraCheckoutDir,
 		filepath.Join(checkoutInfo.RelativePath, "use-of-781.blob"))
-	assert.NoError(t, err)
+	require.NoError(t, err)

 	// Running the garbage collector should only remove those two unused files.
 	assert.FileExists(t, absPaths["6001.blob"], "file should exist before GC")
@ -244,9 +250,9 @@ func TestGarbageCollect(t *testing.T) {
 	assert.FileExists(t, absPaths["7488.blob"], "file should exist after dry-run GC")
 	server.GCStorage(false)
 	_, err = os.Stat(absPaths["6001.blob"])
-	assert.True(t, errors.Is(err, fs.ErrNotExist), "file %s should NOT exist after GC", absPaths["6001.blob"])
+	assert.ErrorIs(t, err, fs.ErrNotExist, "file %s should NOT exist after GC", absPaths["6001.blob"])
 	_, err = os.Stat(absPaths["7488.blob"])
-	assert.True(t, errors.Is(err, fs.ErrNotExist), "file %s should NOT exist after GC", absPaths["7488.blob"])
+	assert.ErrorIs(t, err, fs.ErrNotExist, "file %s should NOT exist after GC", absPaths["7488.blob"])

 	// Used files should still exist.
 	assert.FileExists(t, absPaths["781.blob"])
--- a/pkg/shaman/config/testing.go
+++ b/pkg/shaman/config/testing.go
@ -23,7 +23,6 @@
 package config

 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"time"
@ -31,7 +30,7 @@ import (

 // CreateTestConfig creates a configuration + cleanup function.
 func CreateTestConfig() (conf Config, cleanup func()) {
-	tempDir, err := ioutil.TempDir("", "shaman-test-")
+	tempDir, err := os.MkdirTemp("", "shaman-test-")
 	if err != nil {
 		panic(err)
 	}
--- a/pkg/shaman/fileserver/receivefile_test.go
+++ b/pkg/shaman/fileserver/receivefile_test.go
@ -33,6 +33,7 @@ import (
 	"projects.blender.org/studio/flamenco/pkg/shaman/hasher"

 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"projects.blender.org/studio/flamenco/pkg/shaman/filestore"
 )

@ -79,14 +80,14 @@ func TestStoreFile(t *testing.T) {

 	// The correct checksum should be accepted.
 	err = testWithChecksum(correctChecksum, filesize)
-	assert.NoError(t, err)
+	require.NoError(t, err)

 	path, status = server.fileStore.ResolveFile(correctChecksum, filesize, filestore.ResolveEverything)
 	assert.Equal(t, filestore.StatusStored, status)
 	assert.FileExists(t, path)

 	savedContent, err := ioutil.ReadFile(path)
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	assert.EqualValues(t, payload, savedContent, "The file should be saved uncompressed")
 }

--- a/pkg/shaman/filestore/filestore_test.go
+++ b/pkg/shaman/filestore/filestore_test.go
@ -29,6 +29,7 @@ import (
 	"testing"

 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )

 // mustCreateFile creates an empty file.
@ -105,17 +106,17 @@ func TestOpenForUpload(t *testing.T) {
 	fileSize := int64(len(contents))

 	file, err := store.OpenForUpload("abcdefxxx", fileSize)
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	_, err = file.Write(contents)
-	assert.NoError(t, err)
-	assert.NoError(t, file.Close())
+	require.NoError(t, err)
+	require.NoError(t, file.Close())

 	foundPath, status := store.ResolveFile("abcdefxxx", fileSize, ResolveEverything)
 	assert.Equal(t, file.Name(), foundPath)
 	assert.Equal(t, StatusUploading, status)

 	readContents, err := ioutil.ReadFile(foundPath)
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	assert.EqualValues(t, contents, readContents)
 }

@ -130,14 +131,14 @@ func TestMoveToStored(t *testing.T) {
 	assert.Error(t, err)

 	file, err := store.OpenForUpload("abcdefxxx", fileSize)
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	_, err = file.Write(contents)
-	assert.NoError(t, err)
-	assert.NoError(t, file.Close())
+	require.NoError(t, err)
+	require.NoError(t, file.Close())
 	tempLocation := file.Name()

 	err = store.MoveToStored("abcdefxxx", fileSize, file.Name())
-	assert.NoError(t, err, "moving file %s", file.Name())
+	require.NoError(t, err, "moving file %s", file.Name())

 	foundPath, status := store.ResolveFile("abcdefxxx", fileSize, ResolveEverything)
 	assert.NotEqual(t, file.Name(), foundPath)
--- a/pkg/shaman/filestore/substore_test.go
+++ b/pkg/shaman/filestore/substore_test.go
@ -29,6 +29,7 @@ import (
 	"testing"

 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )

 func TestStoragePrefix(t *testing.T) {
@ -61,7 +62,7 @@ func TestFilePermissions(t *testing.T) {
 		t.SkipNow()
 	}
 	dirname, err := os.MkdirTemp("", "file-permission-test")
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	defer os.RemoveAll(dirname)

 	bin := storageBin{
@ -71,11 +72,11 @@ func TestFilePermissions(t *testing.T) {
 	}

 	file, err := bin.openForWriting("testfilename.blend")
-	assert.NoError(t, err)
+	require.NoError(t, err)
 	defer file.Close()

 	filestat, err := file.Stat()
-	assert.NoError(t, err)
+	require.NoError(t, err)

 	// The exact permissions depend on the current (unittest) process umask. This
 	// umask is not easy to get, which is why we have a copy of `tempfile.go` in
--- a/pkg/shaman/touch/touch_test.go
+++ b/pkg/shaman/touch/touch_test.go
@ -29,6 +29,7 @@ import (
 	"time"

 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )

 func TestTouch(t *testing.T) {
@ -46,7 +47,7 @@ func TestTouch(t *testing.T) {
 	assert.Nil(t, Touch(testPath))

 	stat, err := os.Stat(testPath)
-	assert.NoError(t, err)
+	require.NoError(t, err)

 	threshold := time.Now().Add(-5 * time.Second)
 	assert.True(t, stat.ModTime().After(threshold),
--- a/web/app/src/components/jobs/JobDetails.vue
+++ b/web/app/src/components/jobs/JobDetails.vue
@ -34,16 +34,6 @@
            <span @click="copyElementText" class="click-to-copy">{{ jobData.id }}</span>
          </dd>

-          <template v-if="workerTag">
-            <!-- TODO: fetch tag name and show that instead, and allow editing of the tag. -->
-            <dt class="field-name" title="Worker Tag">Tag</dt>
-            <dd :title="workerTag.description">
-              <span @click="copyElementData" class="click-to-copy" :data-clipboard="workerTag.id">{{
-                workerTag.name
-              }}</span>
-            </dd>
-          </template>
-
          <dt class="field-name" title="Name">Name</dt>
          <dd>{{ jobData.name }}</dd>

@ -52,9 +42,15 @@
            {{ jobData.status }}
          </dd>

-          <dt class="field-type" title="Type">Type</dt>
+          <dt class="field-type" title="Job Type">Job Type</dt>
          <dd>{{ jobType ? jobType.label : jobData.type }}</dd>

+          <dt class="field-worker-tag" title="Worker Tag">Worker Tag</dt>
+          <dd v-if="workerTag" :title="workerTag.description">
+            {{ workerTag.name }}
+          </dd>
+          <dd v-else class="no-worker-tag">All Workers</dd>
+
          <dt class="field-priority" title="Priority">Priority</dt>
          <dd>
            <PopoverEditableJobPriority :jobId="jobData.id" :priority="jobData.priority" />
@ -289,4 +285,8 @@ export default {
  color: var(--indicator-color);
  font-weight: bold;
 }
+
+dd.no-worker-tag {
+  color: var(--color-text-muted);
+}
 </style>
--- a/web/project-website/content/_index.md
+++ b/web/project-website/content/_index.md
@ -38,7 +38,7 @@ software. Development is supported by the Blender project.

 ### Simple and Portable

-Flamenco consists of a few components and requires almost no configuration
+Flamenco consists of a few components and requires almost no configuration in order
 to be used in production.

 {{< /columns >}}
@ -48,13 +48,13 @@ to be used in production.
 ### Easy Customization

 Designed to be customizable, Flamenco allows TDs to specify
-Job Types using the JavaScript language and seamlessly fit into the pipeline.
+Job Types are specified using the JavaScript language and seamlessly fit into a pipeline.

 <--->

 ### Cross-platform and Self-hosted

-Flamenco runs on all major operating system, and is fully hosted on your own hardware.
+Flamenco runs on all major operating systems, and is self hostable.
 Your data is yours, and yours alone.

 {{< /columns >}}
@ -63,7 +63,7 @@ Your data is yours, and yours alone.

 ### Robust Technology

-The core of Flamenco is build using Go and SQLite. Check out the sources on
+The core of Flamenco is built using Go and SQLite. Check out the source code on
 [projects.blender.org](https://projects.blender.org/studio/flamenco).

 <--->
@ -71,6 +71,6 @@ The core of Flamenco is build using Go and SQLite. Check out the sources on
 ### In Development

 Flamenco v3 is in active development at Blender Studio. Join
-[the chat](https://blender.chat/channel/flamenco) to see what's happening!
+[the chat](https://chat.blender.org/#/room/#flamenco:blender.org) to see what's happening!

 {{< /columns >}}
--- a/web/project-website/content/development/get-involved/_index.md
+++ b/web/project-website/content/development/get-involved/_index.md
@ -15,7 +15,7 @@ Join the community on the [#flamenco channel][chat] of Blender Chat to discuss
 development topics. New faces are always welcome! Also, make sure you check out
 the [quickstart guide](/usage/quickstart/).

-[chat]: https://blender.chat/channel/flamenco
+[chat]: https://chat.blender.org/#/room/#flamenco:blender.org

 <--->

--- a/web/project-website/content/faq/_index.md
+++ b/web/project-website/content/faq/_index.md
@ -224,3 +224,13 @@ well, and thus `\` becomes `\\`.
 In other words, even though it looks strange, this is not a bug in Flamenco. The
 aim is to prevent you from seeing these doublings as little as possible, but
 unfortunately it cannot always be avoided.
+
+### Assets are missing!
+
+When your blend file references your assets (textures, linked blend files, etc.)
+with an absolute path, **Flamenco assumes that this path is valid for all
+Workers, and will not copy those assets to the shared storage.** This makes it
+possible to store large files, like simulation caches, on the shared storage,
+without Flamenco creating a copy for each render job.
+
+Read more on this in [Absolute vs. Relative Paths](/usage/shared-storage/#absolute-vs-relative-paths).
--- a/web/project-website/content/third-party-jobs/_index.md
+++ b/web/project-website/content/third-party-jobs/_index.md
@ -29,5 +29,5 @@ directory if necessary. Then restart Flamenco Manager and in Blender press the

 [jobtypes]: {{< ref "usage/job-types" >}}
 [built-in-scripts]: https://projects.blender.org/studio/flamenco/src/branch/main/internal/manager/job_compilers/scripts
-[flamencochannel]: https://blender.chat/channel/flamenco
+[flamencochannel]: https://chat.blender.org/#/room/#flamenco:blender.org
 [tracker]: https://projects.blender.org/studio/flamenco/issues/new?template=.gitea%2fissue_template%2fjobtype.yaml
--- a/web/project-website/content/usage/job-types/builtin.md
+++ b/web/project-website/content/usage/job-types/builtin.md
@ -0,0 +1,40 @@
+---
+title: Built-in Job Types
+weight: 10
+---
+
+Flamenco comes with built-in job types that are used for most common tasks. Currently, there are two of them:
+
+- Simple Blender Render
+- Single Image Render
+
+## Simple Blender Render
+
+This built-in job type is used for rendering a sequence of frames from a single Blender file, and potentially creating a preview video for compatible formats using FFmpeg. This job type is suitable for straightforward rendering tasks where one needs to render a range of frames and potentially compile them into a video. Note that this job type does not render into video formats directly, so the output format should be FFmpeg-compatible image formats.
+
+The job type defines several settings that can be configured when submitting a job:
+
+- `Frames` _string, required_: The frame range to render, e.g. '47', '1-30', '3, 5-10, 47-327'. It could also be set to use scene range or automatically determined on submission.
+- `Chunk Size` _integer, default: 1_: Number of frames to render in one Blender render task.
+- `Render Output Root` _string, required_: Base directory where render output is stored. Job-specific parts will be appended to this path.
+- `Add Path Components` _integer, required, default: 0_: Number of path components from the current blend file to use in the render output path.
+- `Render Output Path` _non-editable_: Final file path where render output will be saved. This is a computed value based on the `Render Output Root` and `Add Path Components` settings.
+
+By using this job type, you can easily distribute Blender rendering tasks across multiple workers in your Flamenco setup, potentially saving significant time on large rendering projects.
+
+## Single Image Render
+
+This built-in job type is designed for distributed rendering of a single image from a Blender file. It splits the image into tiles, renders each tile separately, and then merges the tiles back into a single image. This approach allows for parallel processing of different parts of the image, potentially speeding up the rendering process.
+
+Currently, the job type supports composition, as long as there is one single `Render Layers` node. The job type does not support `Denoising` node.
+
+The job type defines several settings that can be configured when submitting a job:
+
+- `Tile Size X` _integer, default: 64: Tile size in pixels for the X axis, does not need to be divisible by the image width.
+- `Tile Size Y` _integer, default: 64: Tile size in pixels for the Y axis, does not need to be divisible by the image height.
+- `Frame` _integer, required_: The frame to render. By default, it uses the current frame in the Blender scene.
+- `Render Output Root` _string, required_: Base directory where render output is stored. Job-specific parts will be appended to this path.
+- `Add Path Components` _integer, required, default: 0_: Number of path components from the current blend file to use in the render output path.
+- `Render Output Path` _non-editable_: Final file path where render output will be saved. This is a computed value based on the `Render Output Root` and `Add Path Components` settings.
+
+Choosing the right tile size is crucial for performance. Too small tiles might increase overhead, while too large tiles might not distribute the workload effectively.
--- a/web/project-website/content/usage/jobs-tasks-commands/commands.md
+++ b/web/project-website/content/usage/jobs-tasks-commands/commands.md
@ -26,7 +26,7 @@ The constructed CLI invocation will be `{exe} {exeArgs} {argsBefore} {blendfile}

 Flamenco Worker monitors the logging of Blender; lines like `Saved: filename.jpg` are recognised and sent as preview images to Flamenco Manager.

-## FFmpeg: `create-video`
+## FFmpeg: `frames-to-video`

 Uses FFmpeg to convert an image sequence to a video file.

--- a/web/project-website/content/usage/shared-storage/_index.md
+++ b/web/project-website/content/usage/shared-storage/_index.md
@ -92,3 +92,26 @@ have arrived on a specific worker, without waiting for *all* syncing to be
 completed (as someone may have just submitted another job).

 [jobtypes]: {{< ref "/usage/job-types" >}}
+
+## Absolute vs. Relative Paths
+
+Blender can reference assets (textures, linked blend files, etc.) in two ways:
+
+- by **relative path**, like `//textures\my-favourite-brick.exr`, which is relative to the blend file, or
+- by **absolute path**, like `D:\texture-library\my-favourite-brick.exr`, which is the full path of the file.
+
+When an asset is referenced by an absolute path, **Flamenco assumes that this
+path is valid for all Workers, and will not copy those assets to the shared
+storage.** This makes it possible to store large files, like simulation caches,
+on the shared storage, without Flamenco creating a copy for each render job.
+
+{{< hint type=Warning >}} On Windows it is not possible to construct a relative
+path to an asset when that asset is no a different drive than the main blend
+file. If you still want Flamenco to copy such assets, there are two workarounds:
+
+- Move your asset libraries to the same drive as your Blender projects.
+- Use [symbolic links][symlinks-guide-windows] to make your assets available at
+  a suitable path.
+
+[symlinks-guide-windows]: https://www.howtogeek.com/16226/complete-guide-to-symbolic-links-symlinks-on-windows-or-linux/
+{{< /hint >}}