"Open Cached Render" doesn't refresh Render Result or Compositor #107008

New Issue

Matthew Hinson · 2023-04-16T15:15:09+02:00

Matthew Hinson commented

2023-04-16 15:15:09 +02:00

System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 496.13

Blender Version
Broken: version: 3.6.0 Alpha, branch: main, commit date: 2023-04-14 22:58, hash: e078419c9c12

Short description of error
The menu item "Image -> Open Cached Render" in the Image Editor loads the .exr cache file into Slot 1 of the Render Result, but often doesn't show it did this, making it seem like nothing happened. Users have to manually switch to Render Result -> Slot 1 (or manually refresh it if it was already selected), and manually refresh the Compositor.

Exact steps for others to reproduce the error
Preparation:

Launch Blender.
Enable "Cache Result" in the scene's Output properties.
Render the scene.
Close Blender (without saving the file).

Scenario 1 (working correctly):

Launch Blender.
Replace the 3D Viewport by an Image Editor.
Click "Image -> Open Cached Render." The Image Editor switches to the Render Result and displays the cached render as expected.
Close Blender.

Scenario 2 (no automatic switch to Render Result):

Launch Blender.
Replace the 3D Viewport by an Image Editor.
Click "Image -> New" and accept the defaults.
Click "Image -> Open Cached Render." The Image Editor does not switch to the Render Result. Where's the render? Did the menu item do anything at all?
Manually switch to the Render Result. The cached render is visible now.
Close Blender.

Scenario 3 (no automatic switch to Slot 1, dangerous render overwrite):

Launch Blender.
Duplicate the default cube.
Render the scene.
Select Slot 2.
Click "Image -> Open Cached Render." Nothing happens? Where's the old render?
Select Slot 1. There's the old render! But wait, it overwrote the new render without even warning us!
Close Blender.

(It might be better to load the cached render into the selected slot instead of Slot 1, and ask for confirmation if that slot already contains an image; after all, users might think it'll automatically pick a free slot or even just open the render as a regular image, and unintentionally lose a render as a result.)

Scenario 4 (no automatic refresh on load):

Launch Blender.
Switch to the "Compositing" workspace and enable "Use Nodes."
Switch to the "Rendering" workspace.
Click Image -> Open Cached Render. The Render Result displays a checkerboard - but no render. Again, seemingly nothing got opened.
Switch to Slot 2 and back to Slot 1. The render is visible now.
Switch back to the "Compositing" workspace. Here, too, no render is visible.
Open the View Layer dropdown of the "Render Layers" node and select the same "ViewLayer" again. The render is visible now.
Close Blender.

Scenario 5 (no automatic refresh on scene switch):

Launch Blender.
Create a new scene (Full Copy).
Create a single-user copy of the cube's material and give it a different color.
Render the second scene and close the "Blender Render" window again.
Switch back to the first scene, render that one too, and again close the "Blender Render" window.
Switch to the "Rendering" workspace.
Switch between the two scenes and notice that the render doesn't automatically update. You have to switch between slots or workspaces to update it manually.

**System Information** Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 496.13 **Blender Version** Broken: version: 3.6.0 Alpha, branch: main, commit date: 2023-04-14 22:58, hash: `e078419c9c12` **Short description of error** The menu item "Image -> Open Cached Render" in the Image Editor loads the .exr cache file into Slot 1 of the Render Result, but often doesn't show it did this, making it seem like nothing happened. Users have to manually switch to Render Result -> Slot 1 (or manually refresh it if it was already selected), and manually refresh the Compositor. **Exact steps for others to reproduce the error** Preparation: * Launch Blender. * Enable "Cache Result" in the scene's Output properties. * Render the scene. * Close Blender (without saving the file). Scenario 1 (working correctly): * Launch Blender. * Replace the 3D Viewport by an Image Editor. * Click "Image -> Open Cached Render." The Image Editor switches to the Render Result and displays the cached render as expected. * Close Blender. Scenario 2 (no automatic switch to Render Result): * Launch Blender. * Replace the 3D Viewport by an Image Editor. * Click "Image -> New" and accept the defaults. * Click "Image -> Open Cached Render." The Image Editor does *not* switch to the Render Result. Where's the render? Did the menu item do anything at all? * Manually switch to the Render Result. The cached render is visible now. * Close Blender. Scenario 3 (no automatic switch to Slot 1, dangerous render overwrite): * Launch Blender. * Duplicate the default cube. * Render the scene. * Select Slot 2. * Click "Image -> Open Cached Render." Nothing happens? Where's the old render? * Select Slot 1. There's the old render! But wait, it overwrote the new render without even warning us! * Close Blender. (It might be better to load the cached render into the selected slot instead of Slot 1, and ask for confirmation if that slot already contains an image; after all, users might think it'll automatically pick a free slot or even just open the render as a regular image, and unintentionally lose a render as a result.) Scenario 4 (no automatic refresh on load): * Launch Blender. * Switch to the "Compositing" workspace and enable "Use Nodes." * Switch to the "Rendering" workspace. * Click Image -> Open Cached Render. The Render Result displays a checkerboard - but no render. Again, seemingly nothing got opened. * Switch to Slot 2 and back to Slot 1. The render is visible now. * Switch back to the "Compositing" workspace. Here, too, no render is visible. * Open the View Layer dropdown of the "Render Layers" node and select the same "ViewLayer" again. The render is visible now. * Close Blender. Scenario 5 (no automatic refresh on scene switch): * Launch Blender. * Create a new scene (Full Copy). * Create a single-user copy of the cube's material and give it a different color. * Render the second scene and close the "Blender Render" window again. * Switch back to the first scene, render that one too, and again close the "Blender Render" window. * Switch to the "Rendering" workspace. * Switch between the two scenes and notice that the render doesn't automatically update. You have to switch between slots or workspaces to update it manually.

Matthew Hinson added the

labels 2023-04-16 15:15:10 +02:00

Germano Cavalcante commented

2023-04-21 16:04:41 +02:00

Thank you for the report.

As multiple issues are being reported, this report falls under the Multi-report closing scenario as described in the Triaging_Playbook.

But I'll take the risk and confirm as is, as the issues are related.

Thank you for the report. As multiple issues are being reported, this report falls under the `Multi-report` closing scenario as described in the [Triaging_Playbook](https://wiki.blender.org/wiki/Process/Bug_Reports/Triaging_Playbook). But I'll take the risk and confirm as is, as the issues are related.

Germano Cavalcante added

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"Open Cached Render" doesn't refresh Render Result or Compositor #107008