vertex paint face selction display bug gpu subdivision #96356

New Issue

Enzio Probst · 2022-03-12T00:06:58+01:00

Enzio Probst commented

2022-03-12 00:06:58 +01:00

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.41

Blender Version
Broken: version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash: c77597cd0e

Short description of error
Face selection mode overlays in vertex paint mode produce drawing glitches when gpu subdivision is enabled.

Exact steps for others to reproduce the error

Make sure {nav Preferences -> Viewport -> Subdivision -> GPU Subdivision} is enabled
Create Suzanne
Add Subdiv Modifier
Go to Vertex Paint Mode
Enable Face Selection Mode
Select Some Faces
If nothing weird happens zoom in and switch back and forth between vertex and face selection mode

this is how the error looks for every tested setup
randomly chaning when switching on and off face selection mode

Only happens if GPU subdivision is enabled
Also tested on following gpus all on Windows 10:
GTX 980, GTX 1070, GTX 1080, RTX2070 Super, RTX 2080

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.41 **Blender Version** Broken: version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash: `c77597cd0e` **Short description of error** Face selection mode overlays in vertex paint mode produce drawing glitches when gpu subdivision is enabled. **Exact steps for others to reproduce the error** - Make sure {nav Preferences -> Viewport -> Subdivision -> GPU Subdivision} is enabled - Create Suzanne - Add Subdiv Modifier - Go to Vertex Paint Mode - Enable Face Selection Mode - Select Some Faces - If nothing weird happens zoom in and switch back and forth between vertex and face selection mode this is how the error looks for every tested setup randomly chaning when switching on and off face selection mode ![image.png](https://archive.blender.org/developer/F12922054/image.png) Only happens if GPU subdivision is enabled Also tested on following gpus all on Windows 10: GTX 980, GTX 1070, GTX 1080, RTX2070 Super, RTX 2080

Enzio Probst commented

2022-03-12 00:06:58 +01:00

Added subscriber: @EnzioProbst

blender-admin commented

2022-03-12 00:06:58 +01:00

#96626 was marked as duplicate of this issue

Austin Dunham commented

2022-03-12 02:40:16 +01:00

Added subscriber: @wardred

Austin Dunham commented

2022-03-12 02:40:16 +01:00

Enzio,

 Nice catch!  I'm running into the same issue with a simple character I was creating and turning off GPU subdivision resolved the issue.  If I didn't have any materials on my object, it seemed okay.  I only saw the issue in edit mode.  Object mode looked fine.

 This happened on both my laptop and desktop.  Both systems are running Kubuntu 20.04.  Desktop has an AMD Threadripper and nvidia 3090.  Laptop is a Dell XPS with an Intel i7 and an AMD Vega integrated graphics.

version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash: c77597cd0e

Edit:
Not sure if it'll help, but I'm attaching my model. In object mode it looks fine.

Simply hopping into edit mode shows the issue with the materials.

If you grab a couple of the vertexes right in the middle of the belly and move them around you should see the splines.

Turning off GPU subdivision seems to resolve both immediately.

Thomas_Rex.blend

Enzio, ``` Nice catch! I'm running into the same issue with a simple character I was creating and turning off GPU subdivision resolved the issue. If I didn't have any materials on my object, it seemed okay. I only saw the issue in edit mode. Object mode looked fine. ``` ``` This happened on both my laptop and desktop. Both systems are running Kubuntu 20.04. Desktop has an AMD Threadripper and nvidia 3090. Laptop is a Dell XPS with an Intel i7 and an AMD Vega integrated graphics. ``` ![PuffZillaMaterialsFreakOut.jpg](https://archive.blender.org/developer/F12922398/PuffZillaMaterialsFreakOut.jpg) ![PuffZillaMaterialsFreakOut1.jpg](https://archive.blender.org/developer/F12922400/PuffZillaMaterialsFreakOut1.jpg) ![PuffZillaMaterialsFreakOut2jpg.jpg](https://archive.blender.org/developer/F12922403/PuffZillaMaterialsFreakOut2jpg.jpg) version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash: c77597cd0e15 Edit: Not sure if it'll help, but I'm attaching my model. In object mode it looks fine. Simply hopping into edit mode shows the issue with the materials. If you grab a couple of the vertexes right in the middle of the belly and move them around you should see the splines. Turning off GPU subdivision seems to resolve both immediately. [Thomas_Rex.blend](https://archive.blender.org/developer/F12923354/Thomas_Rex.blend)

Pratik Borhade commented

2022-03-12 14:10:39 +01:00

Added subscribers: @kevindietrich, @PratikPB2123

Pratik Borhade commented

2022-03-12 14:10:39 +01:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Pratik Borhade commented

2022-03-12 14:10:39 +01:00

Hi, thanks for the report. Can't reproduce here the exact issue you've shown.
But noticed some wires on mesh which I think are not intentional.
@kevindietrich , can you check?

Graphics card: Intel(R) UHD Graphics 620 Intel 4.5.0 - Build 26.20.100.7323```

Hi, thanks for the report. Can't reproduce here the exact issue you've shown. But noticed some wires on mesh which I think are not intentional. @kevindietrich , can you check? ![image.png](https://archive.blender.org/developer/F12923179/image.png) ```Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: Intel(R) UHD Graphics 620 Intel 4.5.0 - Build 26.20.100.7323```

Pratik Borhade commented

2022-03-21 06:04:28 +01:00

Added subscriber: @Flapcats