bpy.ops.render.render() no cause update Image Editor for Render Results #104534

New Issue

Bartosz Moniewski · 2023-02-09T18:43:35+01:00

Bartosz Moniewski commented

2023-02-09 18:43:35 +01:00

System Information
Operating system: Win10
Graphics card: Nvidia RTX 2070

Blender Version
Broken: 3.1 to 3.5 alpha
Worked: 3.0

Short description of error

Render Results in Image Editor no longer display images after running bpy.ops.render.render(). Images can be saved and correctly reflects the state of the scene, which means that actual rendering works fine. Missing part is refreshing image buffer to display the renders in the Image Editor.

I assume it might be caused by 'DrawManager: Image engine support huge images.' introduced in 3.1. Similar report were made about baked and generated textures.

Render Results are displayed while interacting with the editor, such as changing zoom or resizing the window.
Setting operator execution context to 'INVOKE_DEFAULT' updates Render Results but also freezes UI and stops animation playback. In our project we run simple eevee renders in a modal operator to see "pixelart" models in real-time. Interacting with scenes and animation playback is crucial for us so 'INVOKE_DEFAULT' is not acceptable workaround.

Exact steps for others to reproduce the error

Download RenderResultsBug.blend and see attached video.

Worked:

Open the file in Blender 3.0
Run the script from the Text Editor. The Test panel will appear in the sidebar of the 3D view.
Toggle "Active Render" in the Test panel. The render will appear in the Image Editor.
Scrub the timeline or play animation to see Render Results updates in real-time.

Broken:

Open the file in blender 3.1
Run the script.
Press "Render once" in the Test panel. Something changes in the Image Editor, but the render is not displayed.
Toggle "Active Rendering". The render does not appear.
Scrub the timeline or play an animation. The render is not updated.
Play the animation and resize the Image Editor window. The render updates, but only while resizing the window.

**System Information** Operating system: Win10 Graphics card: Nvidia RTX 2070 **Blender Version** Broken: 3.1 to 3.5 alpha Worked: 3.0 **Short description of error** Render Results in Image Editor no longer display images after running `bpy.ops.render.render()`. Images can be saved and correctly reflects the state of the scene, which means that actual rendering works fine. Missing part is refreshing image buffer to display the renders in the Image Editor. I assume it might be caused by ['DrawManager: Image engine support huge images.'](https://projects.blender.org/blender/blender/commit/bdd74e1e9338) introduced in 3.1. Similar report were made about baked and generated textures. Render Results are displayed while interacting with the editor, such as changing zoom or resizing the window. Setting operator execution context to `'INVOKE_DEFAULT'` updates Render Results but also freezes UI and stops animation playback. In our project we run simple eevee renders in a modal operator to see "pixelart" models in real-time. Interacting with scenes and animation playback is crucial for us so `'INVOKE_DEFAULT'` is not acceptable workaround. **Exact steps for others to reproduce the error** Download RenderResultsBug.blend and see attached video. **Worked:** * Open the file in Blender **3.0** * Run the script from the Text Editor. The Test panel will appear in the sidebar of the 3D view. * Toggle "Active Render" in the Test panel. The render will appear in the Image Editor. * Scrub the timeline or play animation to see Render Results updates in real-time. **Broken:** * Open the file in blender **3.1** * Run the script. * Press "Render once" in the Test panel. Something changes in the Image Editor, but the render is not displayed. * Toggle "Active Rendering". The render does not appear. * Scrub the timeline or play an animation. The render is not updated. * Play the animation and resize the Image Editor window. The render updates, but only while resizing the window.

RenderResultsBug3.blend

1.2 MiB

RenderResultsBug.mp4

8.4 MiB

Bartosz Moniewski added the

labels 2023-02-09 18:43:35 +01:00

Iliya Katushenock changed title from ~~Image Editor Render Results no longer update after bpy.ops.render.render()~~ to bpy.ops.render.render() no cause update Image Editor for Render Results

2023-02-09 18:57:34 +01:00

Iliya Katushenock added

Module

Pipeline, Assets & IO

Status

Needs Info from Developers

and removed

Status

Needs Triage

labels 2023-02-09 18:58:35 +01:00

Iliya Katushenock added

Module

EEVEE & Viewport

and removed

Module

Pipeline, Assets & IO

labels 2023-02-09 18:59:44 +01:00

Iliya Katushenock added

and removed

labels 2023-02-09 19:14:27 +01:00

Bartosz Moniewski commented

2023-02-10 16:51:19 +01:00

I did some more tests and updated the blend file.

area.tag_redraw() don't update the image.
bpy.ops.wm.redraw_timer(type='DRAW_WIN_SWAP', iterations=1) don't work too.

I did some more tests and updated the blend file. `area.tag_redraw()` don't update the image. `bpy.ops.wm.redraw_timer(type='DRAW_WIN_SWAP', iterations=1)` don't work too.

Brecht Van Lommel added

and removed

Needs Info from Developers

Type

Report

labels 2023-02-10 19:52:54 +01:00

Brecht Van Lommel added this to the Render & Cycles project 2023-02-10 19:53:01 +01:00

Bartosz Moniewski commented

2023-02-13 14:38:36 +01:00

I tested forcing updates in bpy.app.handlers.render_complete as suggested by Jeroen Bakker. Still no luck.

I updated the blend file.

I tested forcing updates in `bpy.app.handlers.render_complete` as suggested by Jeroen Bakker. Still no luck. I updated the blend file.

Jeroen Bakker commented

2023-02-13 14:42:48 +01:00

I will assign the task to me and look into it this week. It might be a missing edge case when we did the image engine. I do see the value of having this to work as described by the ticket.

❤️ 1

Jeroen Bakker self-assigned this 2023-02-13 14:43:15 +01:00

Jeroen Bakker referenced this issue from a commit

2023-03-06 08:39:04 +01:00

Fix #104534: Image editor doesn't refresh after render.render.

Jeroen Bakker referenced this issue

2023-03-06 08:43:36 +01:00

Blender LTS: Maintenance Task 3.3 #100749

Jeroen Bakker closed this issue

2023-03-06 08:44:44 +01:00

Blender Bot added

Status