diff --git a/intern/cycles/device/metal/device_impl.mm b/intern/cycles/device/metal/device_impl.mm
index 824f9fd1d19..34679a1f33e 100644
--- a/intern/cycles/device/metal/device_impl.mm
+++ b/intern/cycles/device/metal/device_impl.mm
@@ -567,6 +567,10 @@ void MetalDevice::compile_and_load(int device_id, MetalPipelineType pso_type)
     thread_scoped_lock lock(existing_devices_mutex);
     if (MetalDevice *instance = get_device_by_ID(device_id, lock)) {
       if (mtlLibrary) {
+        if (error && [error localizedDescription]) {
+          VLOG_WARNING << "MSL compilation messages: " << [[error localizedDescription] UTF8String];
+        }
+
         instance->mtlLibrary[pso_type] = mtlLibrary;
 
         starttime = time_dt();
diff --git a/intern/cycles/device/metal/kernel.mm b/intern/cycles/device/metal/kernel.mm
index b626b920bbc..8e092a3ebc5 100644
--- a/intern/cycles/device/metal/kernel.mm
+++ b/intern/cycles/device/metal/kernel.mm
@@ -715,7 +715,7 @@ void MetalKernelPipeline::compile()
           }
         }
       };
-      if (computePipelineStateDescriptor.linkedFunctions) {
+      if (linked_functions) {
         addComputePipelineFunctionsWithDescriptor();
       }
 
@@ -748,7 +748,7 @@ void MetalKernelPipeline::compile()
       }
 
       /* Add pipeline into the new archive (unless we did it earlier). */
-      if (pipeline && !computePipelineStateDescriptor.linkedFunctions) {
+      if (pipeline && !linked_functions) {
         addComputePipelineFunctionsWithDescriptor();
       }
     }
diff --git a/intern/cycles/kernel/device/gpu/parallel_sorted_index.h b/intern/cycles/kernel/device/gpu/parallel_sorted_index.h
index 749221af8f9..f5053587853 100644
--- a/intern/cycles/kernel/device/gpu/parallel_sorted_index.h
+++ b/intern/cycles/kernel/device/gpu/parallel_sorted_index.h
@@ -38,7 +38,7 @@ ccl_device_inline void gpu_parallel_sort_bucket_pass(const uint num_states,
                                                      ccl_gpu_shared int *buckets,
                                                      const ushort local_id,
                                                      const ushort local_size,
-                                                     const ushort grid_id)
+                                                     const uint grid_id)
 {
   /* Zero the bucket sizes. */
   if (local_id < max_shaders) {
@@ -89,7 +89,7 @@ ccl_device_inline void gpu_parallel_sort_write_pass(const uint num_states,
                                                     ccl_gpu_shared int *local_offset,
                                                     const ushort local_id,
                                                     const ushort local_size,
-                                                    const ushort grid_id)
+                                                    const uint grid_id)
 {
   /* Calculate each partition's global offset from the prefix sum of the active state counts per
    * partition. */
diff --git a/intern/cycles/kernel/device/metal/compat.h b/intern/cycles/kernel/device/metal/compat.h
index 317bdc2eaae..a0c8b37b3af 100644
--- a/intern/cycles/kernel/device/metal/compat.h
+++ b/intern/cycles/kernel/device/metal/compat.h
@@ -109,7 +109,7 @@ struct kernel_gpu_##name \
            const uint metal_global_id, \
            const ushort metal_local_id, \
            const ushort metal_local_size, \
-           const ushort metal_grid_id, \
+           const uint metal_grid_id, \
            uint simdgroup_size, \
            uint simd_lane_index, \
            uint simd_group_index, \
@@ -122,7 +122,7 @@ kernel void cycles_metal_##name(device const kernel_gpu_##name *params_struct, \
                                 const uint metal_global_id [[thread_position_in_grid]], \
                                 const ushort metal_local_id   [[thread_position_in_threadgroup]], \
                                 const ushort metal_local_size [[threads_per_threadgroup]], \
-                                const ushort metal_grid_id    [[threadgroup_position_in_grid]], \
+                                const uint metal_grid_id    [[threadgroup_position_in_grid]], \
                                 uint simdgroup_size [[threads_per_simdgroup]], \
                                 uint simd_lane_index [[thread_index_in_simdgroup]], \
                                 uint simd_group_index [[simdgroup_index_in_threadgroup]], \
@@ -135,7 +135,7 @@ void kernel_gpu_##name::run(thread MetalKernelContext& context, \
                   const uint metal_global_id, \
                   const ushort metal_local_id, \
                   const ushort metal_local_size, \
-                  const ushort metal_grid_id, \
+                  const uint metal_grid_id, \
                   uint simdgroup_size, \
                   uint simd_lane_index, \
                   uint simd_group_index, \
diff --git a/intern/cycles/kernel/integrator/shade_background.h b/intern/cycles/kernel/integrator/shade_background.h
index 3c01a162d01..12639715465 100644
--- a/intern/cycles/kernel/integrator/shade_background.h
+++ b/intern/cycles/kernel/integrator/shade_background.h
@@ -149,7 +149,7 @@ ccl_device_inline void integrate_distant_lights(KernelGlobals kg,
             ((ls.shader & SHADER_EXCLUDE_TRANSMIT) && (path_flag & PATH_RAY_TRANSMIT)) ||
             ((ls.shader & SHADER_EXCLUDE_CAMERA) && (path_flag & PATH_RAY_CAMERA)) ||
             ((ls.shader & SHADER_EXCLUDE_SCATTER) && (path_flag & PATH_RAY_VOLUME_SCATTER)))
-          return;
+          continue;
       }
 #endif
 
@@ -159,7 +159,7 @@ ccl_device_inline void integrate_distant_lights(KernelGlobals kg,
          * generate a firefly for small lights since it is improbable. */
         const ccl_global KernelLight *klight = &kernel_data_fetch(lights, lamp);
         if (klight->use_caustics)
-          return;
+          continue;
       }
 #endif /* __MNEE__ */
 
@@ -169,7 +169,7 @@ ccl_device_inline void integrate_distant_lights(KernelGlobals kg,
       ccl_private ShaderData *emission_sd = AS_SHADER_DATA(&emission_sd_storage);
       Spectrum light_eval = light_sample_shader_eval(kg, state, emission_sd, &ls, ray_time);
       if (is_zero(light_eval)) {
-        return;
+        continue;
       }
 
       /* MIS weighting. */
diff --git a/scripts/startup/bl_ui/space_graph.py b/scripts/startup/bl_ui/space_graph.py
index 5a550acd107..4757f32bfbe 100644
--- a/scripts/startup/bl_ui/space_graph.py
+++ b/scripts/startup/bl_ui/space_graph.py
@@ -252,7 +252,7 @@ class GRAPH_MT_key(Menu):
 
         layout.separator()
         layout.operator_menu_enum("graph.keyframe_insert", "type")
-        layout.operator_menu_enum("graph.fmodifier_add", "type")
+        layout.operator_menu_enum("graph.fmodifier_add", "type").only_active = False
         layout.operator("graph.sound_bake")
 
         layout.separator()
diff --git a/source/blender/bmesh/bmesh_class.h b/source/blender/bmesh/bmesh_class.h
index a724a8783d4..6449d442276 100644
--- a/source/blender/bmesh/bmesh_class.h
+++ b/source/blender/bmesh/bmesh_class.h
@@ -378,6 +378,8 @@ typedef struct BMesh {
    * This allows save invalidation of a #BMesh when it's freed,
    * so the Python object will report it as having been removed,
    * instead of crashing on invalid memory access.
+   *
+   * Doesn't hold a #PyObject reference, cleared when the last object is de-referenced.
    */
   void *py_handle;
 } BMesh;
diff --git a/source/blender/compositor/realtime_compositor/shaders/library/gpu_shader_compositor_luminance_matte.glsl b/source/blender/compositor/realtime_compositor/shaders/library/gpu_shader_compositor_luminance_matte.glsl
index 3647ac583fe..c3e28723237 100644
--- a/source/blender/compositor/realtime_compositor/shaders/library/gpu_shader_compositor_luminance_matte.glsl
+++ b/source/blender/compositor/realtime_compositor/shaders/library/gpu_shader_compositor_luminance_matte.glsl
@@ -8,7 +8,7 @@ void node_composite_luminance_matte(vec4 color,
                                     out float matte)
 {
   float luminance = get_luminance(color.rgb, luminance_coefficients);
-  float alpha = clamp(0.0, 1.0, (luminance - low) / (high - low));
+  float alpha = clamp((luminance - low) / (high - low), 0.0, 1.0);
   matte = min(alpha, color.a);
   result = color * matte;
 }
diff --git a/source/blender/draw/engines/eevee/shaders/surface_lib.glsl b/source/blender/draw/engines/eevee/shaders/surface_lib.glsl
index 5ee020358b5..6bd9d222420 100644
--- a/source/blender/draw/engines/eevee/shaders/surface_lib.glsl
+++ b/source/blender/draw/engines/eevee/shaders/surface_lib.glsl
@@ -101,6 +101,7 @@ SSR_INTERFACE
 #  if defined(USE_BARYCENTRICS) && !defined(HAIR_SHADER)
 vec3 barycentric_distances_get()
 {
+#    if defined(GPU_OPENGL)
   /* NOTE: No need to undo perspective divide since it is not applied yet. */
   vec3 pos0 = (ProjectionMatrixInverse * gpu_position_at_vertex(0)).xyz;
   vec3 pos1 = (ProjectionMatrixInverse * gpu_position_at_vertex(1)).xyz;
@@ -119,6 +120,17 @@ vec3 barycentric_distances_get()
   d = dot(d10, edge21);
   dists.z = sqrt(dot(edge21, edge21) - d * d);
   return dists.xyz;
+#    elif defined(GPU_METAL)
+  /* Calculate Barycentric distances from available parameters in Metal. */
+  float3 wp_delta = (length(dfdx(worldPosition.xyz)) + length(dfdy(worldPosition.xyz)));
+  float3 bc_delta = (length(dfdx(gpu_BaryCoord)) + length(dfdy(gpu_BaryCoord)));
+  float3 rate_of_change = wp_delta / bc_delta;
+  vec3 dists;
+  dists.x = length(rate_of_change * (1.0 - gpu_BaryCoord.x));
+  dists.y = length(rate_of_change * (1.0 - gpu_BaryCoord.y));
+  dists.z = length(rate_of_change * (1.0 - gpu_BaryCoord.z));
+  return dists.xyz;
+#    endif
 }
 #  endif
 
diff --git a/source/blender/editors/gpencil/gpencil_edit.c b/source/blender/editors/gpencil/gpencil_edit.c
index 6ede4726821..9620b381e84 100644
--- a/source/blender/editors/gpencil/gpencil_edit.c
+++ b/source/blender/editors/gpencil/gpencil_edit.c
@@ -1715,6 +1715,10 @@ static int gpencil_strokes_paste_exec(bContext *C, wmOperator *op)
          */
 
         for (bGPDframe *gpf = init_gpf; gpf; gpf = gpf->next) {
+          /* Active frame is copied later, so don't need duplicate the stroke here. */
+          if (gpl->actframe == gpf) {
+            continue;
+          }
           if (gpf->flag & GP_FRAME_SELECT) {
             if (gpf) {
               /* Create new stroke */
diff --git a/source/blender/editors/gpencil/gpencil_sculpt_paint.c b/source/blender/editors/gpencil/gpencil_sculpt_paint.c
index ab3edfdd4fa..d7ea38f5e3f 100644
--- a/source/blender/editors/gpencil/gpencil_sculpt_paint.c
+++ b/source/blender/editors/gpencil/gpencil_sculpt_paint.c
@@ -1411,7 +1411,8 @@ static float gpencil_sculpt_rotation_eval_get(tGP_BrushEditData *gso,
 
   const GP_SpaceConversion *gsc = &gso->gsc;
   bGPDstroke *gps_orig = (gps_eval->runtime.gps_orig) ? gps_eval->runtime.gps_orig : gps_eval;
-  bGPDspoint *pt_orig = &gps_orig->points[pt_eval->runtime.idx_orig];
+  bGPDspoint *pt_orig = (pt_eval->runtime.pt_orig) ? &gps_orig->points[pt_eval->runtime.idx_orig] :
+                                                     pt_eval;
   bGPDspoint *pt_prev_eval = NULL;
   bGPDspoint *pt_orig_prev = NULL;
   if (idx_eval != 0) {
diff --git a/source/blender/editors/gpencil/gpencil_select.c b/source/blender/editors/gpencil/gpencil_select.c
index 05718eb95e0..f39c55a2138 100644
--- a/source/blender/editors/gpencil/gpencil_select.c
+++ b/source/blender/editors/gpencil/gpencil_select.c
@@ -2039,24 +2039,16 @@ static bool gpencil_generic_stroke_select(bContext *C,
   /* init space conversion stuff */
   gpencil_point_conversion_init(C, &gsc);
 
+  /* Use only object transform matrix because all layer transformations are already included
+   * in the evaluated stroke. */
+  Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
+  Object *ob_eval = depsgraph != NULL ? DEG_get_evaluated_object(depsgraph, ob) : ob;
+  float select_mat[4][4];
+  copy_m4_m4(select_mat, ob_eval->object_to_world);
+
   /* deselect all strokes first? */
-  if (SEL_OP_USE_PRE_DESELECT(sel_op) || GPENCIL_PAINT_MODE(gpd)) {
-    /* Set selection index to 0. */
-    gpd->select_last_index = 0;
-
-    CTX_DATA_BEGIN (C, bGPDstroke *, gps, editable_gpencil_strokes) {
-      bGPDspoint *pt;
-      int i;
-
-      for (i = 0, pt = gps->points; i < gps->totpoints; i++, pt++) {
-        pt->flag &= ~GP_SPOINT_SELECT;
-      }
-
-      gps->flag &= ~GP_STROKE_SELECT;
-      BKE_gpencil_stroke_select_index_reset(gps);
-    }
-    CTX_DATA_END;
-
+  if (SEL_OP_USE_PRE_DESELECT(sel_op)) {
+    deselect_all_selected(C);
     changed = true;
   }
 
@@ -2071,9 +2063,9 @@ static bool gpencil_generic_stroke_select(bContext *C,
     for (i = 0, pt = gps->points; i < gps->totpoints; i++, pt++) {
       bGPDspoint *pt_active = (pt->runtime.pt_orig) ? pt->runtime.pt_orig : pt;
 
-      /* Convert point coords to screen-space. */
-      const bool is_inside = is_inside_fn(
-          gsc.region, gpstroke_iter.diff_mat, &pt_active->x, user_data);
+      /* Convert point coords to screen-space. Needs to use the evaluated point
+       * to consider modifiers. */
+      const bool is_inside = is_inside_fn(gsc.region, select_mat, &pt->x, user_data);
       if (strokemode == false) {
         const bool is_select = (pt_active->flag & GP_SPOINT_SELECT) != 0;
         const int sel_op_result = ED_select_op_action_deselected(sel_op, is_select, is_inside);
diff --git a/source/blender/editors/screen/glutil.c b/source/blender/editors/screen/glutil.c
index dc5a9885e16..b68d7886716 100644
--- a/source/blender/editors/screen/glutil.c
+++ b/source/blender/editors/screen/glutil.c
@@ -147,6 +147,18 @@ void immDrawPixelsTexTiled_scaling_clipping(IMMDrawPixelsTexState *state,
                                             const float color[4])
 {
   int subpart_x, subpart_y, tex_w = 256, tex_h = 256;
+#ifdef __APPLE__
+  if (GPU_backend_get_type() == GPU_BACKEND_METAL) {
+    /* NOTE(Metal): The Metal backend will keep all temporary texture memory within a command
+     * submission in-flight, so using a partial tile size does not provide any tangible memory
+     * reduction, but does incur additional API overhead and significant cache inefficiency on AMD
+     * platforms.
+     * The Metal API also provides smart resource paging such that the application can
+     * still efficiently swap memory, even if system is low in physical memory. */
+    tex_w = img_w;
+    tex_h = img_h;
+  }
+#endif
   int seamless, offset_x, offset_y, nsubparts_x, nsubparts_y;
   int components;
   const bool use_clipping = ((clip_min_x < clip_max_x) && (clip_min_y < clip_max_y));
diff --git a/source/blender/editors/space_file/filelist.cc b/source/blender/editors/space_file/filelist.cc
index caea344bc97..e6e46ed81e1 100644
--- a/source/blender/editors/space_file/filelist.cc
+++ b/source/blender/editors/space_file/filelist.cc
@@ -3882,6 +3882,16 @@ static void filelist_readjob_all_asset_library(FileListReadJob *job_params,
   /* A valid, but empty file-list from now. */
   filelist->filelist.entries_num = 0;
 
+  asset_system::AssetLibrary *current_file_library;
+  {
+    AssetLibraryReference library_ref{};
+    library_ref.custom_library_index = -1;
+    library_ref.type = ASSET_LIBRARY_LOCAL;
+
+    current_file_library = AS_asset_library_load(job_params->current_main, library_ref);
+  }
+
+  job_params->load_asset_library = current_file_library;
   filelist_readjob_main_assets_add_items(job_params, stop, do_update, progress);
 
   /* When only doing partially reload for main data, we're done. */
@@ -3904,6 +3914,10 @@ static void filelist_readjob_all_asset_library(FileListReadJob *job_params,
         if (root_path.is_empty()) {
           return;
         }
+        if (&nested_library == current_file_library) {
+          /* Skip the "Current File" library, it's already loaded above. */
+          return;
+        }
 
         /* Override library info to read this library. */
         job_params->load_asset_library = &nested_library;
diff --git a/source/blender/editors/space_graph/graph_edit.c b/source/blender/editors/space_graph/graph_edit.c
index b1f4673f7eb..79c8b26d463 100644
--- a/source/blender/editors/space_graph/graph_edit.c
+++ b/source/blender/editors/space_graph/graph_edit.c
@@ -2843,7 +2843,7 @@ void GRAPH_OT_fmodifier_add(wmOperatorType *ot)
   ot->prop = prop;
 
   RNA_def_boolean(
-      ot->srna, "only_active", 1, "Only Active", "Only add F-Modifier to active F-Curve");
+      ot->srna, "only_active", false, "Only Active", "Only add F-Modifier to active F-Curve");
 }
 
 /** \} */
diff --git a/source/blender/editors/transform/transform_snap_object.cc b/source/blender/editors/transform/transform_snap_object.cc
index 7fa13180f67..c3405ffcfba 100644
--- a/source/blender/editors/transform/transform_snap_object.cc
+++ b/source/blender/editors/transform/transform_snap_object.cc
@@ -3200,7 +3200,7 @@ static eSnapMode transform_snap_context_project_view3d_mixed_impl(SnapObjectCont
                                                                   Depsgraph *depsgraph,
                                                                   const ARegion *region,
                                                                   const View3D *v3d,
-                                                                  const eSnapMode snap_to_flag,
+                                                                  eSnapMode snap_to_flag,
                                                                   const SnapObjectParams *params,
                                                                   const float init_co[3],
                                                                   const float mval[2],
@@ -3235,7 +3235,16 @@ static eSnapMode transform_snap_context_project_view3d_mixed_impl(SnapObjectCont
 
   const RegionView3D *rv3d = static_cast<RegionView3D *>(region->regiondata);
 
-  bool use_occlusion_test = params->use_occlusion_test && !XRAY_ENABLED(v3d);
+  if (snap_to_flag & (SCE_SNAP_MODE_FACE_RAYCAST | SCE_SNAP_MODE_FACE_NEAREST)) {
+    if (params->use_occlusion_test && XRAY_ENABLED(v3d)) {
+      /* Remove Snap to Face with Occlusion Test as they are not visible in wireframe mode. */
+      snap_to_flag &= ~(SCE_SNAP_MODE_FACE_RAYCAST | SCE_SNAP_MODE_FACE_NEAREST);
+    }
+    else if (prev_co == nullptr || init_co == nullptr) {
+      /* No location to work with #SCE_SNAP_MODE_FACE_NEAREST. */
+      snap_to_flag &= ~SCE_SNAP_MODE_FACE_NEAREST;
+    }
+  }
 
   /* NOTE: if both face ray-cast and face nearest are enabled, first find result of nearest, then
    * override with ray-cast. */
@@ -3261,7 +3270,7 @@ static eSnapMode transform_snap_context_project_view3d_mixed_impl(SnapObjectCont
     }
   }
 
-  if (snap_to_flag & SCE_SNAP_MODE_FACE_RAYCAST || use_occlusion_test) {
+  if (snap_to_flag & SCE_SNAP_MODE_FACE_RAYCAST) {
     float ray_start[3], ray_normal[3];
     if (!ED_view3d_win_to_ray_clipped_ex(
             depsgraph, region, v3d, mval, nullptr, ray_normal, ray_start, true)) {
diff --git a/source/blender/gpu/metal/mtl_shader_generator.mm b/source/blender/gpu/metal/mtl_shader_generator.mm
index 5810ed79f33..7be93ce04ce 100644
--- a/source/blender/gpu/metal/mtl_shader_generator.mm
+++ b/source/blender/gpu/metal/mtl_shader_generator.mm
@@ -1268,6 +1268,11 @@ bool MTLShader::generate_msl_from_glsl(const shader::ShaderCreateInfo *info)
       ss_fragment << "uint gl_PrimitiveID;" << std::endl;
     }
 
+    /* Global barycentrics. */
+    if (msl_iface.uses_barycentrics) {
+      ss_fragment << "vec3 gpu_BaryCoord;\n";
+    }
+
     /* Add Texture members. */
     for (const MSLTextureSampler &tex : msl_iface.texture_samplers) {
       if (bool(tex.stage & ShaderStage::FRAGMENT)) {
@@ -2036,33 +2041,7 @@ std::string MSLGeneratorInterface::generate_msl_fragment_entry_stub()
 
   /* Barycentrics. */
   if (this->uses_barycentrics) {
-
-    /* Main barycentrics. */
     out << shader_stage_inst_name << ".gpu_BaryCoord = mtl_barycentric_coord.xyz;" << std::endl;
-
-    /* barycentricDist represents the world-space distance from the current world-space position
-     * to the opposite edge of the vertex. */
-    out << "float3 worldPos = " << shader_stage_inst_name << ".worldPosition.xyz;" << std::endl;
-    out << "float3 wpChange = (length(dfdx(worldPos))+length(dfdy(worldPos)));" << std::endl;
-    out << "float3 bcChange = "
-           "(length(dfdx(mtl_barycentric_coord))+length(dfdy(mtl_barycentric_coord)));"
-        << std::endl;
-    out << "float3 rateOfChange = wpChange/bcChange;" << std::endl;
-
-    /* Distance to edge using inverse barycentric value, as rather than the length of 0.7
-     * contribution, we'd want the distance to the opposite side. */
-    out << shader_stage_inst_name
-        << ".gpu_BarycentricDist.x = length(rateOfChange * "
-           "(1.0-mtl_barycentric_coord.x));"
-        << std::endl;
-    out << shader_stage_inst_name
-        << ".gpu_BarycentricDist.y = length(rateOfChange * "
-           "(1.0-mtl_barycentric_coord.y));"
-        << std::endl;
-    out << shader_stage_inst_name
-        << ".gpu_BarycentricDist.z = length(rateOfChange * "
-           "(1.0-mtl_barycentric_coord.z));"
-        << std::endl;
   }
 
   /* Populate Uniforms and uniform blocks. */
diff --git a/source/blender/gpu/metal/mtl_texture.mm b/source/blender/gpu/metal/mtl_texture.mm
index eb8949e2c66..54b6cad6542 100644
--- a/source/blender/gpu/metal/mtl_texture.mm
+++ b/source/blender/gpu/metal/mtl_texture.mm
@@ -594,17 +594,6 @@ void gpu::MTLTexture::update_sub(
       }
     }
 
-    /* Prepare staging buffer for data. */
-    id<MTLBuffer> staging_buffer = nil;
-    uint64_t staging_buffer_offset = 0;
-
-    /* Fetch allocation from scratch buffer. */
-    MTLTemporaryBuffer allocation =
-        ctx->get_scratchbuffer_manager().scratch_buffer_allocate_range_aligned(totalsize, 256);
-    memcpy(allocation.data, data, totalsize);
-    staging_buffer = allocation.metal_buffer;
-    staging_buffer_offset = allocation.buffer_offset;
-
     /* Common Properties. */
     MTLPixelFormat compatible_write_format = mtl_format_get_writeable_view_format(
         destination_format);
@@ -616,6 +605,12 @@ void gpu::MTLTexture::update_sub(
       return;
     }
 
+    /* Fetch allocation from memory pool. */
+    MTLBuffer *temp_allocation = MTLContext::get_global_memory_manager()->allocate_with_data(
+        totalsize, true, data);
+    id<MTLBuffer> staging_buffer = temp_allocation->get_metal_buffer();
+    BLI_assert(staging_buffer != nil);
+
     /* Prepare command encoders. */
     id<MTLBlitCommandEncoder> blit_encoder = nil;
     id<MTLComputeCommandEncoder> compute_encoder = nil;
@@ -697,7 +692,7 @@ void gpu::MTLTexture::update_sub(
           int max_array_index = ((type_ == GPU_TEXTURE_1D_ARRAY) ? extent[1] : 1);
           for (int array_index = 0; array_index < max_array_index; array_index++) {
 
-            int buffer_array_offset = staging_buffer_offset + (bytes_per_image * array_index);
+            int buffer_array_offset = (bytes_per_image * array_index);
             [blit_encoder
                      copyFromBuffer:staging_buffer
                        sourceOffset:buffer_array_offset
@@ -727,7 +722,7 @@ void gpu::MTLTexture::update_sub(
             MTLComputeState &cs = ctx->main_command_buffer.get_compute_state();
             cs.bind_pso(pso);
             cs.bind_compute_bytes(&params, sizeof(params), 0);
-            cs.bind_compute_buffer(staging_buffer, staging_buffer_offset, 1);
+            cs.bind_compute_buffer(staging_buffer, 0, 1);
             cs.bind_compute_texture(texture_handle, 0);
             [compute_encoder
                       dispatchThreads:MTLSizeMake(extent[0], 1, 1) /* Width, Height, Layer */
@@ -747,7 +742,7 @@ void gpu::MTLTexture::update_sub(
             MTLComputeState &cs = ctx->main_command_buffer.get_compute_state();
             cs.bind_pso(pso);
             cs.bind_compute_bytes(&params, sizeof(params), 0);
-            cs.bind_compute_buffer(staging_buffer, staging_buffer_offset, 1);
+            cs.bind_compute_buffer(staging_buffer, 0, 1);
             cs.bind_compute_texture(texture_handle, 0);
             [compute_encoder
                       dispatchThreads:MTLSizeMake(extent[0], extent[1], 1) /* Width, layers, nil */
@@ -779,7 +774,7 @@ void gpu::MTLTexture::update_sub(
             }
 
             [blit_encoder copyFromBuffer:staging_buffer
-                            sourceOffset:staging_buffer_offset + texture_array_relative_offset
+                            sourceOffset:texture_array_relative_offset
                        sourceBytesPerRow:bytes_per_row
                      sourceBytesPerImage:bytes_per_image
                               sourceSize:MTLSizeMake(extent[0], extent[1], 1)
@@ -807,7 +802,7 @@ void gpu::MTLTexture::update_sub(
             MTLComputeState &cs = ctx->main_command_buffer.get_compute_state();
             cs.bind_pso(pso);
             cs.bind_compute_bytes(&params, sizeof(params), 0);
-            cs.bind_compute_buffer(staging_buffer, staging_buffer_offset, 1);
+            cs.bind_compute_buffer(staging_buffer, 0, 1);
             cs.bind_compute_texture(texture_handle, 0);
             [compute_encoder
                       dispatchThreads:MTLSizeMake(
@@ -828,7 +823,7 @@ void gpu::MTLTexture::update_sub(
             MTLComputeState &cs = ctx->main_command_buffer.get_compute_state();
             cs.bind_pso(pso);
             cs.bind_compute_bytes(&params, sizeof(params), 0);
-            cs.bind_compute_buffer(staging_buffer, staging_buffer_offset, 1);
+            cs.bind_compute_buffer(staging_buffer, 0, 1);
             cs.bind_compute_texture(texture_handle, 0);
             [compute_encoder dispatchThreads:MTLSizeMake(extent[0],
                                                          extent[1],
@@ -848,7 +843,7 @@ void gpu::MTLTexture::update_sub(
                                    ctx->pipeline_state.unpack_row_length);
           int bytes_per_image = bytes_per_row * extent[1];
           [blit_encoder copyFromBuffer:staging_buffer
-                          sourceOffset:staging_buffer_offset
+                          sourceOffset:0
                      sourceBytesPerRow:bytes_per_row
                    sourceBytesPerImage:bytes_per_image
                             sourceSize:MTLSizeMake(extent[0], extent[1], extent[2])
@@ -871,7 +866,7 @@ void gpu::MTLTexture::update_sub(
           MTLComputeState &cs = ctx->main_command_buffer.get_compute_state();
           cs.bind_pso(pso);
           cs.bind_compute_bytes(&params, sizeof(params), 0);
-          cs.bind_compute_buffer(staging_buffer, staging_buffer_offset, 1);
+          cs.bind_compute_buffer(staging_buffer, 0, 1);
           cs.bind_compute_texture(texture_handle, 0);
           [compute_encoder
                     dispatchThreads:MTLSizeMake(
@@ -896,7 +891,7 @@ void gpu::MTLTexture::update_sub(
             int face_index = offset[2] + i;
 
             [blit_encoder copyFromBuffer:staging_buffer
-                            sourceOffset:staging_buffer_offset + texture_array_relative_offset
+                            sourceOffset:texture_array_relative_offset
                        sourceBytesPerRow:bytes_per_row
                      sourceBytesPerImage:bytes_per_image
                               sourceSize:MTLSizeMake(extent[0], extent[1], 1)
@@ -930,7 +925,7 @@ void gpu::MTLTexture::update_sub(
           for (int i = 0; i < extent[2]; i++) {
             int face_index = offset[2] + i;
             [blit_encoder copyFromBuffer:staging_buffer
-                            sourceOffset:staging_buffer_offset + texture_array_relative_offset
+                            sourceOffset:texture_array_relative_offset
                        sourceBytesPerRow:bytes_per_row
                      sourceBytesPerImage:bytes_per_image
                               sourceSize:MTLSizeMake(extent[0], extent[1], 1)
@@ -1058,6 +1053,11 @@ void gpu::MTLTexture::update_sub(
 
     /* Decrement texture reference counts. This ensures temporary texture views are released. */
     [texture_handle release];
+
+    /* Release temporary staging buffer allocation.
+     * NOTE: Allocation will be tracked with command submission and released once no longer in use.
+     */
+    temp_allocation->free();
   }
 }
 
diff --git a/source/blender/gpu/opengl/gl_shader.cc b/source/blender/gpu/opengl/gl_shader.cc
index 7fe0d878798..579b105c0d7 100644
--- a/source/blender/gpu/opengl/gl_shader.cc
+++ b/source/blender/gpu/opengl/gl_shader.cc
@@ -360,9 +360,16 @@ static std::ostream &print_qualifier(std::ostream &os, const Qualifier &qualifie
   return os;
 }
 
-static void print_resource(std::ostream &os, const ShaderCreateInfo::Resource &res)
+static void print_resource(std::ostream &os,
+                           const ShaderCreateInfo::Resource &res,
+                           bool auto_resource_location)
 {
-  if (GLContext::explicit_location_support) {
+  if (auto_resource_location && res.bind_type == ShaderCreateInfo::Resource::BindType::SAMPLER) {
+    /* Skip explicit binding location for samplers when not needed, since drivers can usually
+     * handle more sampler declarations this way (as long as they're not actually used by the
+     * shader). See #105661. */
+  }
+  else if (GLContext::explicit_location_support) {
     os << "layout(binding = " << res.slot;
     if (res.bind_type == ShaderCreateInfo::Resource::BindType::IMAGE) {
       os << ", " << to_string(res.image.format);
@@ -466,14 +473,14 @@ std::string GLShader::resources_declare(const ShaderCreateInfo &info) const
 
   ss << "\n/* Pass Resources. */\n";
   for (const ShaderCreateInfo::Resource &res : info.pass_resources_) {
-    print_resource(ss, res);
+    print_resource(ss, res, info.auto_resource_location_);
   }
   for (const ShaderCreateInfo::Resource &res : info.pass_resources_) {
     print_resource_alias(ss, res);
   }
   ss << "\n/* Batch Resources. */\n";
   for (const ShaderCreateInfo::Resource &res : info.batch_resources_) {
-    print_resource(ss, res);
+    print_resource(ss, res, info.auto_resource_location_);
   }
   for (const ShaderCreateInfo::Resource &res : info.batch_resources_) {
     print_resource_alias(ss, res);
diff --git a/source/blender/makesdna/DNA_scene_types.h b/source/blender/makesdna/DNA_scene_types.h
index ca1d878110f..6fb38eae744 100644
--- a/source/blender/makesdna/DNA_scene_types.h
+++ b/source/blender/makesdna/DNA_scene_types.h
@@ -2296,10 +2296,6 @@ typedef enum eSnapMode {
   SCE_SNAP_MODE_EDGE_PERPENDICULAR = (1 << 5),
   SCE_SNAP_MODE_FACE_NEAREST = (1 << 8),
 
-  SCE_SNAP_MODE_GEOM = (SCE_SNAP_MODE_VERTEX | SCE_SNAP_MODE_EDGE | SCE_SNAP_MODE_FACE_RAYCAST |
-                        SCE_SNAP_MODE_EDGE_PERPENDICULAR | SCE_SNAP_MODE_EDGE_MIDPOINT |
-                        SCE_SNAP_MODE_FACE_NEAREST),
-
   /** #ToolSettings.snap_node_mode */
   SCE_SNAP_MODE_NODE_X = (1 << 0),
   SCE_SNAP_MODE_NODE_Y = (1 << 1),
@@ -2314,6 +2310,10 @@ typedef enum eSnapMode {
 ENUM_OPERATORS(eSnapMode, SCE_SNAP_MODE_GRID)
 #endif
 
+#define SCE_SNAP_MODE_GEOM \
+  (SCE_SNAP_MODE_VERTEX | SCE_SNAP_MODE_EDGE | SCE_SNAP_MODE_FACE_RAYCAST | \
+   SCE_SNAP_MODE_EDGE_PERPENDICULAR | SCE_SNAP_MODE_EDGE_MIDPOINT | SCE_SNAP_MODE_FACE_NEAREST)
+
 /** #SequencerToolSettings.snap_mode */
 #define SEQ_SNAP_TO_STRIPS (1 << 0)
 #define SEQ_SNAP_TO_CURRENT_FRAME (1 << 1)
diff --git a/source/blender/makesrna/intern/rna_fcurve.c b/source/blender/makesrna/intern/rna_fcurve.c
index f92b137d3ae..b15350cc243 100644
--- a/source/blender/makesrna/intern/rna_fcurve.c
+++ b/source/blender/makesrna/intern/rna_fcurve.c
@@ -204,6 +204,51 @@ static StructRNA *rna_FModifierType_refine(struct PointerRNA *ptr)
 #  include "DEG_depsgraph.h"
 #  include "DEG_depsgraph_build.h"
 
+/**
+ * \warning this isn't efficient but it's unavoidable
+ * when only the #ID and the #DriverVar are known.
+ */
+static FCurve *rna_FCurve_find_driver_by_variable(ID *owner_id, DriverVar *dvar)
+{
+  AnimData *adt = BKE_animdata_from_id(owner_id);
+  BLI_assert(adt != NULL);
+  LISTBASE_FOREACH (FCurve *, fcu, &adt->drivers) {
+    ChannelDriver *driver = fcu->driver;
+    if (driver == NULL) {
+      continue;
+    }
+    if (BLI_findindex(&driver->variables, dvar) != -1) {
+      return fcu;
+    }
+  }
+  return NULL;
+}
+
+/**
+ * \warning this isn't efficient but it's unavoidable
+ * when only the #ID and the #DriverTarget are known.
+ */
+static FCurve *rna_FCurve_find_driver_by_target(ID *owner_id, DriverTarget *dtar)
+{
+  AnimData *adt = BKE_animdata_from_id(owner_id);
+  BLI_assert(adt != NULL);
+  LISTBASE_FOREACH (FCurve *, fcu, &adt->drivers) {
+    ChannelDriver *driver = fcu->driver;
+    if (driver == NULL) {
+      continue;
+    }
+    LISTBASE_FOREACH (DriverVar *, dvar, &driver->variables) {
+      /* NOTE: Use #MAX_DRIVER_TARGETS instead of `dvar->num_targets` because
+       * it's possible RNA holds a reference to a target that has been removed.
+       * In this case it's best to return the #FCurve it belongs to instead of nothing. */
+      if (ARRAY_HAS_ITEM(dtar, &dvar->targets[0], MAX_DRIVER_TARGETS)) {
+        return fcu;
+      }
+    }
+  }
+  return NULL;
+}
+
 static bool rna_ChannelDriver_is_simple_expression_get(PointerRNA *ptr)
 {
   ChannelDriver *driver = ptr->data;
@@ -211,20 +256,27 @@ static bool rna_ChannelDriver_is_simple_expression_get(PointerRNA *ptr)
   return BKE_driver_has_simple_expression(driver);
 }
 
-static void rna_ChannelDriver_update_data(Main *bmain, Scene *scene, PointerRNA *ptr)
+static void rna_ChannelDriver_update_data_impl(Main *bmain,
+                                               Scene *scene,
+                                               ID *owner_id,
+                                               ChannelDriver *driver)
 {
-  ID *id = ptr->owner_id;
-  ChannelDriver *driver = ptr->data;
-
   driver->flag &= ~DRIVER_FLAG_INVALID;
 
   /* TODO: this really needs an update guard... */
   DEG_relations_tag_update(bmain);
-  DEG_id_tag_update(id, ID_RECALC_TRANSFORM | ID_RECALC_GEOMETRY);
+  DEG_id_tag_update(owner_id, ID_RECALC_TRANSFORM | ID_RECALC_GEOMETRY);
 
   WM_main_add_notifier(NC_SCENE | ND_FRAME, scene);
 }
 
+static void rna_ChannelDriver_update_data(Main *bmain, Scene *scene, PointerRNA *ptr)
+{
+  ID *id = ptr->owner_id;
+  ChannelDriver *driver = ptr->data;
+  rna_ChannelDriver_update_data_impl(bmain, scene, id, driver);
+}
+
 static void rna_ChannelDriver_update_expr(Main *bmain, Scene *scene, PointerRNA *ptr)
 {
   ChannelDriver *driver = ptr->data;
@@ -238,33 +290,47 @@ static void rna_ChannelDriver_update_expr(Main *bmain, Scene *scene, PointerRNA
 
 static void rna_DriverTarget_update_data(Main *bmain, Scene *scene, PointerRNA *ptr)
 {
-  PointerRNA driverptr;
-  ChannelDriver *driver;
-  FCurve *fcu;
-  AnimData *adt = BKE_animdata_from_id(ptr->owner_id);
-
-  /* find the driver this belongs to and update it */
-  for (fcu = adt->drivers.first; fcu; fcu = fcu->next) {
-    driver = fcu->driver;
-    fcu->flag &= ~FCURVE_DISABLED;
-
-    if (driver) {
-      /* FIXME: need to be able to search targets for required one. */
-      // BLI_findindex(&driver->targets, ptr->data) != -1)
-      RNA_pointer_create(ptr->owner_id, &RNA_Driver, driver, &driverptr);
-      rna_ChannelDriver_update_data(bmain, scene, &driverptr);
-    }
+  DriverTarget *dtar = (DriverTarget *)ptr->data;
+  FCurve *fcu = rna_FCurve_find_driver_by_target(ptr->owner_id, dtar);
+  BLI_assert(fcu); /* This hints at an internal error, data may be corrupt. */
+  if (UNLIKELY(fcu == NULL)) {
+    return;
   }
+  /* Find function ensures it's never NULL. */
+  ChannelDriver *driver = fcu->driver;
+  fcu->flag &= ~FCURVE_DISABLED;
+  rna_ChannelDriver_update_data_impl(bmain, scene, ptr->owner_id, driver);
 }
 
-static void rna_DriverTarget_update_name(Main *bmain, Scene *scene, PointerRNA *ptr)
+static void rna_DriverVariable_update_name(Main *bmain, Scene *scene, PointerRNA *ptr)
 {
-  ChannelDriver *driver = ptr->data;
-  rna_DriverTarget_update_data(bmain, scene, ptr);
-
+  DriverVar *dvar = (DriverVar *)ptr->data;
+  FCurve *fcu = rna_FCurve_find_driver_by_variable(ptr->owner_id, dvar);
+  BLI_assert(fcu); /* This hints at an internal error, data may be corrupt. */
+  if (UNLIKELY(fcu == NULL)) {
+    return;
+  }
+  /* Find function ensures it's never NULL. */
+  ChannelDriver *driver = fcu->driver;
+  fcu->flag &= ~FCURVE_DISABLED;
+  rna_ChannelDriver_update_data_impl(bmain, scene, ptr->owner_id, driver);
   BKE_driver_invalidate_expression(driver, false, true);
 }
 
+static void rna_DriverVariable_update_data(Main *bmain, Scene *scene, PointerRNA *ptr)
+{
+  DriverVar *dvar = (DriverVar *)ptr->data;
+  FCurve *fcu = rna_FCurve_find_driver_by_variable(ptr->owner_id, dvar);
+  BLI_assert(fcu); /* This hints at an internal error, data may be corrupt. */
+  if (UNLIKELY(fcu == NULL)) {
+    return;
+  }
+  /* Find function ensures it's never NULL. */
+  ChannelDriver *driver = fcu->driver;
+  fcu->flag &= ~FCURVE_DISABLED;
+  rna_ChannelDriver_update_data_impl(bmain, scene, ptr->owner_id, driver);
+}
+
 /* ----------- */
 
 /* NOTE: this function exists only to avoid id reference-counting. */
@@ -1924,14 +1990,14 @@ static void rna_def_drivervar(BlenderRNA *brna)
       "Name",
       "Name to use in scripted expressions/functions (no spaces or dots are allowed, "
       "and must start with a letter)");
-  RNA_def_property_update(prop, 0, "rna_DriverTarget_update_name"); /* XXX */
+  RNA_def_property_update(prop, 0, "rna_DriverVariable_update_name");
 
   /* Enums */
   prop = RNA_def_property(srna, "type", PROP_ENUM, PROP_NONE);
   RNA_def_property_enum_items(prop, prop_type_items);
   RNA_def_property_enum_funcs(prop, NULL, "rna_DriverVariable_type_set", NULL);
   RNA_def_property_ui_text(prop, "Type", "Driver variable type");
-  RNA_def_property_update(prop, 0, "rna_ChannelDriver_update_data"); /* XXX */
+  RNA_def_property_update(prop, 0, "rna_DriverVariable_update_data");
 
   /* Targets */
   /* TODO: for nicer api, only expose the relevant props via subclassing,
diff --git a/source/blender/python/bmesh/bmesh_py_types.c b/source/blender/python/bmesh/bmesh_py_types.c
index e218c2384f5..16ffa2f3238 100644
--- a/source/blender/python/bmesh/bmesh_py_types.c
+++ b/source/blender/python/bmesh/bmesh_py_types.c
@@ -989,7 +989,11 @@ static PyObject *bpy_bmesh_free(BPy_BMesh *self)
 
     bm_dealloc_editmode_warn(self);
 
-    if ((self->flag & BPY_BMFLAG_IS_WRAPPED) == 0) {
+    if (self->flag & BPY_BMFLAG_IS_WRAPPED) {
+      /* Ensure further access doesn't return this invalid object, see: #105715. */
+      bm->py_handle = NULL;
+    }
+    else {
       BM_mesh_free(bm);
     }
 
diff --git a/source/blender/python/intern/bpy_rna_array.c b/source/blender/python/intern/bpy_rna_array.c
index 48ba028edf0..07f63d16deb 100644
--- a/source/blender/python/intern/bpy_rna_array.c
+++ b/source/blender/python/intern/bpy_rna_array.c
@@ -247,6 +247,7 @@ static int count_items(PyObject *seq, int dim)
 static int validate_array_length(PyObject *rvalue,
                                  PointerRNA *ptr,
                                  PropertyRNA *prop,
+                                 const bool prop_is_param_dyn_alloc,
                                  int lvalue_dim,
                                  int *r_totitem,
                                  const char *error_prefix)
@@ -266,26 +267,20 @@ static int validate_array_length(PyObject *rvalue,
     return -1;
   }
   if ((RNA_property_flag(prop) & PROP_DYNAMIC) && lvalue_dim == 0) {
-    if (RNA_property_array_length(ptr, prop) != tot) {
-#if 0
-      /* length is flexible */
-      if (!RNA_property_dynamic_array_set_length(ptr, prop, tot)) {
-        /* BLI_snprintf(error_str, error_str_size,
-         *              "%s.%s: array length cannot be changed to %d",
-         *              RNA_struct_identifier(ptr->type), RNA_property_identifier(prop), tot); */
+    const int tot_expected = RNA_property_array_length(ptr, prop);
+    if (tot_expected != tot) {
+      *r_totitem = tot;
+      if (!prop_is_param_dyn_alloc) {
         PyErr_Format(PyExc_ValueError,
-                     "%s %s.%s: array length cannot be changed to %d",
+                     "%s %s.%s: array length cannot be changed to %d (expected %d)",
                      error_prefix,
                      RNA_struct_identifier(ptr->type),
                      RNA_property_identifier(prop),
-                     tot);
+                     tot,
+                     tot_expected);
         return -1;
       }
-#else
-      *r_totitem = tot;
       return 0;
-
-#endif
     }
 
     len = tot;
@@ -340,6 +335,7 @@ static int validate_array_length(PyObject *rvalue,
 static int validate_array(PyObject *rvalue,
                           PointerRNA *ptr,
                           PropertyRNA *prop,
+                          const bool prop_is_param_dyn_alloc,
                           int lvalue_dim,
                           ItemTypeCheckFunc check_item_type,
                           const char *item_type_str,
@@ -410,7 +406,8 @@ static int validate_array(PyObject *rvalue,
       return -1;
     }
 
-    return validate_array_length(rvalue, ptr, prop, lvalue_dim, r_totitem, error_prefix);
+    return validate_array_length(
+        rvalue, ptr, prop, prop_is_param_dyn_alloc, lvalue_dim, r_totitem, error_prefix);
   }
 }
 
@@ -527,15 +524,26 @@ static int py_to_array(PyObject *seq,
   char *data = NULL;
 
   // totdim = RNA_property_array_dimension(ptr, prop, dim_size); /* UNUSED */
+  const int flag = RNA_property_flag(prop);
 
-  if (validate_array(seq, ptr, prop, 0, check_item_type, item_type_str, &totitem, error_prefix) ==
-      -1) {
+  /* Use #ParameterDynAlloc which defines it's own array length. */
+  const bool prop_is_param_dyn_alloc = param_data && (flag & PROP_DYNAMIC);
+
+  if (validate_array(seq,
+                     ptr,
+                     prop,
+                     prop_is_param_dyn_alloc,
+                     0,
+                     check_item_type,
+                     item_type_str,
+                     &totitem,
+                     error_prefix) == -1) {
     return -1;
   }
 
   if (totitem) {
     /* NOTE: this code is confusing. */
-    if (param_data && RNA_property_flag(prop) & PROP_DYNAMIC) {
+    if (prop_is_param_dyn_alloc) {
       /* not freeing allocated mem, RNA_parameter_list_free() will do this */
       ParameterDynAlloc *param_alloc = (ParameterDynAlloc *)param_data;
       param_alloc->array_tot = (int)totitem;
@@ -626,9 +634,16 @@ static int py_to_array_index(PyObject *py,
     copy_value_single(py, ptr, prop, NULL, 0, &index, convert_item, rna_set_index);
   }
   else {
-    if (validate_array(
-            py, ptr, prop, lvalue_dim, check_item_type, item_type_str, &totitem, error_prefix) ==
-        -1) {
+    const bool prop_is_param_dyn_alloc = false;
+    if (validate_array(py,
+                       ptr,
+                       prop,
+                       prop_is_param_dyn_alloc,
+                       lvalue_dim,
+                       check_item_type,
+                       item_type_str,
+                       &totitem,
+                       error_prefix) == -1) {
       return -1;
     }
 
diff --git a/tests/python/bl_pyapi_prop_array.py b/tests/python/bl_pyapi_prop_array.py
index 1132914b14c..5595325d60d 100644
--- a/tests/python/bl_pyapi_prop_array.py
+++ b/tests/python/bl_pyapi_prop_array.py
@@ -195,6 +195,76 @@ class TestPropArrayMultiDimensional(unittest.TestCase):
         del id_type.temp
 
 
+class TestPropArrayDynamicAssign(unittest.TestCase):
+    """
+    Pixels are dynamic in the sense the size can change however the assignment does not define the size.
+    """
+
+    dims = 12
+
+    def setUp(self):
+        self.image = bpy.data.images.new("", self.dims, self.dims)
+
+    def tearDown(self):
+        bpy.data.images.remove(self.image)
+        self.image = None
+
+    def test_assign_fixed_under_1px(self):
+        image = self.image
+        with self.assertRaises(ValueError):
+            image.pixels = [1.0, 1.0, 1.0, 1.0]
+
+    def test_assign_fixed_under_0px(self):
+        image = self.image
+        with self.assertRaises(ValueError):
+            image.pixels = []
+
+    def test_assign_fixed_over_by_1px(self):
+        image = self.image
+        with self.assertRaises(ValueError):
+            image.pixels = ([1.0, 1.0, 1.0, 1.0] * (self.dims * self.dims)) + [1.0]
+
+    def test_assign_fixed(self):
+        # Valid assignment, ensure it works as intended.
+        image = self.image
+        values = [1.0, 0.0, 1.0, 0.0] * (self.dims * self.dims)
+        image.pixels = values
+        self.assertEqual(tuple(values), tuple(image.pixels))
+
+
+class TestPropArrayDynamicArg(unittest.TestCase):
+    """
+    Index array, a dynamic array argument which defines it's own length.
+    """
+
+    dims = 8
+
+    def setUp(self):
+        self.me = bpy.data.meshes.new("")
+        self.me.vertices.add(self.dims)
+        self.ob = bpy.data.objects.new("", self.me)
+
+    def tearDown(self):
+        bpy.data.objects.remove(self.ob)
+        bpy.data.meshes.remove(self.me)
+        self.me = None
+        self.ob = None
+
+    def test_param_dynamic(self):
+        ob = self.ob
+        vg = ob.vertex_groups.new(name="")
+
+        # Add none.
+        vg.add(index=(), weight=1.0, type='REPLACE')
+        for i in range(self.dims):
+            with self.assertRaises(RuntimeError):
+                vg.weight(i)
+
+        # Add all.
+        vg.add(index=range(self.dims), weight=1.0, type='REPLACE')
+        self.assertEqual(tuple([1.0] * self.dims), tuple([vg.weight(i) for i in range(self.dims)]))
+
+
 if __name__ == '__main__':
     import sys
     sys.argv = [__file__] + (sys.argv[sys.argv.index("--") + 1:] if "--" in sys.argv else [])