Multires Sculpting changes Object's Material appearance #93946

New Issue

J. W. · 2021-12-10T21:02:24+01:00

J. W. commented

2021-12-10 21:02:24 +01:00

(click pictures to see animation of problem)

I've noticed that Sculpting characters with the Multires Modifier on leads to strange Material displays both in Eevee and Cycles.
Somehow it messes with the Base Color, Roughness and Alpha? Note how this only happens when "Sculpt Base Mesh" is disabled.
I tried reducing the scene to its basics and managed to replicate it on a simple cube.

I usually use 3.0 but have also tested it on the experimental 3.1.0, to the same results.

Here's the example file:

multires problem.blend

System Information
Operating system: Windows-10-10.0.19042-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1070 with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.11

Blender Version
Broken: version: 3.1.0 Alpha, branch: master, commit date: 2021-12-09 23:43, hash: dffd032bc9

Short description of error
as stated above

Exact steps for others to reproduce the error

.Open attached example .blend file
.Select cube Object
. Make sure Multires modifier's Sculpt is on 1 and "Sculpt Base Mesh" is disabled
. switch from Object to Sculpt Mode
.notice how the material changes (takes on the background's color)

![multires problem.gif](https://archive.blender.org/developer/F12728168/multires_problem.gif) ![multires problem_cycles.gif](https://archive.blender.org/developer/F12728181/multires_problem_cycles.gif) (click pictures to see animation of problem) I've noticed that Sculpting characters with the Multires Modifier on leads to strange Material displays both in Eevee and Cycles. Somehow it messes with the Base Color, Roughness and Alpha? Note how this only happens when "Sculpt Base Mesh" is disabled. I tried reducing the scene to its basics and managed to replicate it on a simple cube. I usually use 3.0 but have also tested it on the experimental 3.1.0, to the same results. Here's the example file: [multires problem.blend](https://archive.blender.org/developer/F12728193/multires_problem.blend) **System Information** Operating system: Windows-10-10.0.19042-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1070 with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.11 **Blender Version** Broken: version: 3.1.0 Alpha, branch: master, commit date: 2021-12-09 23:43, hash: `dffd032bc9` **Short description of error** as stated above **Exact steps for others to reproduce the error** .Open attached example .blend file .Select cube Object . Make sure Multires modifier's Sculpt is on 1 and "Sculpt Base Mesh" is disabled . switch from Object to Sculpt Mode .notice how the material changes (takes on the background's color)

J. W. commented

2021-12-10 21:02:24 +01:00

Added subscriber: @blend_ellie

Richard Antalik commented

2021-12-10 22:15:53 +01:00

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

Simone Lipschitz commented

2021-12-12 16:23:43 +01:00

Added subscribers: @dfelinto, @illussimo

Simone Lipschitz commented

2021-12-12 16:23:43 +01:00

It seems quite difficult to resolve. This issue is reported many times, already since 2.8. See https://developer.blender.org/T63581. I kept asking to give this task high priority. It seems abandoned since nobody is answering my requests anymore to keep us informed. @dfelinto Please give this issue high priority!!!
To any developer who is currently working on this issue, please keep us informed and thanks for your efforts.

It seems quite difficult to resolve. This issue is reported many times, already since 2.8. See https://developer.blender.org/T63581. I kept asking to give this task high priority. It seems abandoned since nobody is answering my requests anymore to keep us informed. @dfelinto Please give this issue high priority!!! To any developer who is currently working on this issue, please keep us informed and thanks for your efforts.

J. W. commented

2021-12-12 21:55:19 +01:00

Thank you Simone. I've noticed the issue for a while now but didn't know it was that persistent. Should it be merged with the task you mentioned?

WMROssi commented

2021-12-12 22:01:53 +01:00

Added subscriber: @Wesley-Rossi

WMROssi commented

2021-12-12 22:01:53 +01:00

Maybe check out #93226 . This is a feature that is going to be implemented. Probably what causes that is UV support with Multires not being ready yet.

Look at: Medium term, Item 5. Sculpt on UV unwrapped mesh.

Maybe check out #93226 . This is a feature that is going to be implemented. Probably what causes that is UV support with Multires not being ready yet. Look at: Medium term, Item 5. Sculpt on UV unwrapped mesh.

Simone Lipschitz commented

2021-12-13 00:42:25 +01:00

Added subscriber: @JosephEagar

Simone Lipschitz commented

2021-12-13 00:42:25 +01:00

@blend_ellie Probably it should be merged with #63581 but I'm not in a position to make such a decision.
@Wesley-Rossi I hope #93226 would solve it but I'm not sure. @JosephEagar could you give us some feedback on this?

@blend_ellie Probably it should be merged with #63581 but I'm not in a position to make such a decision. @Wesley-Rossi I hope #93226 would solve it but I'm not sure. @JosephEagar could you give us some feedback on this?

Paul Larson commented

2022-01-25 02:54:58 +01:00

Added subscriber: @GeorgiaPacific