Cycles: UV render pass corrupted in viewport #92986

New Issue

Jeroen Bakker · 2021-11-10T11:02:05+01:00

Jeroen Bakker commented

2021-11-10 11:02:05 +01:00

System Information
Operating system: Windows-10-10.0.18363-SP0 64 Bits
Graphics card: Intel(R) Iris(R) Plus Graphics Intel 4.5.0 - Build 27.20.100.9664

Blender Version
Broken: version: 3.1.0 Alpha, branch: master, commit date: 2021-11-09 23:23, hash: aa440923c8
Worked: 2.93 LTS

Short description of error
When switching the render passfrom normal to UV the UVs are not displayed correctly.

Exact steps for others to reproduce the error
Download bmw demo file.
in viewport switch to render mode
Enable the normal render pass. After that enable the uv render pass.

{F11785393 width=100%}

Film::update_passes sets shader->need_update_uvs. The problem is that in 3.0 this is called as part of scene update after all syncing, instead of immediately after updating the render passes. That means this information is not available when we sync the geometry.

Note: you can get the proper UVs back if you click on the UVMap in the Property Editor UV Maps panel

**System Information** Operating system: Windows-10-10.0.18363-SP0 64 Bits Graphics card: Intel(R) Iris(R) Plus Graphics Intel 4.5.0 - Build 27.20.100.9664 **Blender Version** Broken: version: 3.1.0 Alpha, branch: master, commit date: 2021-11-09 23:23, hash: `aa440923c8` Worked: 2.93 LTS **Short description of error** When switching the render passfrom normal to UV the UVs are not displayed correctly. **Exact steps for others to reproduce the error** Download bmw demo file. in viewport switch to render mode Enable the normal render pass. After that enable the uv render pass. {[F11785393](https://archive.blender.org/developer/F11785393/uv_render_pass.png) width=100%} `Film::update_passes` sets `shader->need_update_uvs`. The problem is that in 3.0 this is called as part of scene update after all syncing, instead of immediately after updating the render passes. That means this information is not available when we sync the geometry. Note: you can get the proper UVs back if you click on the UVMap in the Property Editor `UV Maps` panel

Jeroen Bakker commented

2021-11-10 11:02:05 +01:00

Added subscriber: @Jeroen-Bakker

blender-admin commented

2021-11-10 11:02:05 +01:00

#102208 was marked as duplicate of this issue

blender-admin commented

2021-11-10 11:02:05 +01:00

#100235 was marked as duplicate of this issue

blender-admin commented

2021-11-10 11:02:05 +01:00

#100157 was marked as duplicate of this issue

Jeroen Bakker commented

2021-11-10 11:02:44 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Gustavo de León commented

2021-11-11 03:34:46 +01:00

Added subscriber: @gusdleon

Gustavo de León commented

2021-11-11 03:34:46 +01:00

Broken in 3.0.0 Beta too

Changing from renderpass "combined" to "UV", breaks the two render pases

Starting with Combined

Changing to UV

Returning to Combined

But if you change from workpase or even change
from object mode to edit mode the glitch is gone

Broken in 3.0.0 Beta too Changing from renderpass "combined" to "UV", breaks the two render pases Starting with Combined ![image.png](https://archive.blender.org/developer/F11791650/image.png) Changing to UV ![image.png](https://archive.blender.org/developer/F11791655/image.png) Returning to Combined ![image.png](https://archive.blender.org/developer/F11791669/image.png) But if you change from workpase or even change from object mode to edit mode the glitch is gone ![image.png](https://archive.blender.org/developer/F11791682/image.png)

William Leeson commented

2021-11-11 10:00:30 +01:00

Added subscriber: @leesonw

William Leeson commented

2021-11-11 10:00:30 +01:00

Did this work before 3.0?

Gustavo de León commented

2021-11-11 12:37:32 +01:00

Works as intended on 2.93.5 a791bdabd0

Tested in the same .blend of my past screenshots

Works as intended on 2.93.5 `a791bdabd0` Tested in the same .blend of my past screenshots ![image.png](https://archive.blender.org/developer/F11793654/image.png)

Brecht Van Lommel commented

2021-11-16 20:10:38 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2021-11-16 20:10:38 +01:00

Film::update_passes sets shader->need_update_uvs. The problem is that in 3.0 this is called as part of scene update after all syncing, instead of immediately after updating the render passes. That means this information is not available when we sync the geometry.

`Film::update_passes` sets `shader->need_update_uvs`. The problem is that in 3.0 this is called as part of scene update after all syncing, instead of immediately after updating the render passes. That means this information is not available when we sync the geometry.

Brecht Van Lommel commented

2022-08-04 19:04:34 +02:00

Added subscribers: @3di, @mano-wii