Regression: Sculpt mode shows entire mesh using only the first material #102067

New Issue

Mysteryem · 2022-10-26T00:54:22+02:00

Mysteryem commented

2022-10-26 00:54:22 +02:00

System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.59

Blender Version
Broken: version: 3.4.0 Alpha, branch: master, commit date: 2022-10-24 19:44, hash: 5d5e0f1b0e
Worked: 3.3.1, 3.3.2 Release Candidate

Short description of error
When in sculpt mode, the viewport shows the mesh as if every polygon was assigned to the first material of the mesh. Both Eevee rendering and Workbench rendering (with Color set to Material) are affected whereas Cycles works as expected. My guess would be that this relates to https://developer.blender.org/rBf1c0249f34c417

Exact steps for others to reproduce the error
The attached .blend file (authored in 3.3.1) has a cube in sculpt mode with a linked duplicate in the scene next to it. The cube's polygons are assigned to only the yellow (second) and red (third) materials of the mesh. In 3.4.0 Alpha, the cube in sculpt mode shows in the viewport entirely blue (the first material), whereas in 3.3.x, the cube in sculpt mode shows the yellow and red materials as expected.
Open the .blend in 3.3.x and 3.4.0 Alpha to compare.
The materials have been set up such that their Viewport Display Color (Material.diffuse_color) is the same as the Base Color of their Principled BSDF nodes so that Workbench/Solid Viewport Shading can also show the issue.
The viewport of the .blend as opened in each version:

SculptOnlyFirstMaterial.blend

**System Information** Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.59 **Blender Version** Broken: version: 3.4.0 Alpha, branch: master, commit date: 2022-10-24 19:44, hash: `5d5e0f1b0e` Worked: 3.3.1, 3.3.2 Release Candidate **Short description of error** When in sculpt mode, the viewport shows the mesh as if every polygon was assigned to the first material of the mesh. Both Eevee rendering and Workbench rendering (with Color set to Material) are affected whereas Cycles works as expected. My guess would be that this relates to https://developer.blender.org/rBf1c0249f34c417 **Exact steps for others to reproduce the error** The attached .blend file (authored in 3.3.1) has a cube in sculpt mode with a linked duplicate in the scene next to it. The cube's polygons are assigned to only the yellow (second) and red (third) materials of the mesh. In 3.4.0 Alpha, the cube in sculpt mode shows in the viewport entirely blue (the first material), whereas in 3.3.x, the cube in sculpt mode shows the yellow and red materials as expected. Open the .blend in 3.3.x and 3.4.0 Alpha to compare. The materials have been set up such that their Viewport Display Color (`Material.diffuse_color`) is the same as the Base Color of their Principled BSDF nodes so that Workbench/Solid Viewport Shading can also show the issue. The viewport of the .blend as opened in each version: ![image.png](https://archive.blender.org/developer/F13769179/image.png) [SculptOnlyFirstMaterial.blend](https://archive.blender.org/developer/F13769160/SculptOnlyFirstMaterial.blend)

Mysteryem commented

2022-10-26 00:54:22 +02:00

Added subscriber: @Mysteryem-2

TheRedWaxPolice commented

2022-10-26 01:00:02 +02:00

Added subscriber: @TheRedWaxPolice

Omar Emara commented

2022-10-26 09:38:15 +02:00

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

Omar Emara changed title from ~~Sculpt mode shows entire mesh using only the first material~~ to Regression: Sculpt mode shows entire mesh using only the first material

2022-10-26 09:38:55 +02:00

Omar Emara commented

2022-10-26 10:02:43 +02:00

Added subscriber: @OmarEmaraDev

Omar Emara commented

2022-10-26 10:02:43 +02:00

The commit in the report doesn't seem to be the cause. So I will bisect.

Omar Emara commented

2022-10-26 12:29:56 +02:00

Sculpt mode is too messy to bisect in that area, so I can only give a range. The first bad commit is somewhere between a790873d2a (good) and ec8118a59e (bad).
Most likely 65900d88a8.

Sculpt mode is too messy to bisect in that area, so I can only give a range. The first bad commit is somewhere between a790873d2a811e0c244266b090d92470cf378ef2 (good) and ec8118a59e02260945050febf8b7c0080e8c1c4e (bad). Most likely 65900d88a8317c207885ae4a3993272112114f36.

blender-admin commented

2022-10-26 19:00:55 +02:00

This issue was referenced by bc7de854c9

This issue was referenced by bc7de854c90dd45758e7ff59c88ed0121c8cccca

Joseph Eagar commented

2022-10-26 19:02:53 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Joseph Eagar closed this issue

2022-10-26 19:02:53 +02:00

Joseph Eagar self-assigned this 2022-10-26 19:02:53 +02:00

Joseph Eagar commented

2022-10-26 19:03:41 +02:00

Okay, I fixed this for normal and multires meshes, but not DynTopo.

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Regression: Sculpt mode shows entire mesh using only the first material #102067