Cycles Sculpt Vertex Color crash or wrong render #85048

New Issue

Ahmed · 2021-01-25T17:20:51+01:00

Ahmed commented

2021-01-25 17:20:51 +01:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GT 525M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 391.35

Blender Version
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-01-24 23:16, hash: cf6d17a6aa

Caused by bbe6d44928

Short description of error
Sculpt Vertex Color doesn't appear in Cycles viewport or render and sometimes Blender crashes but works fine in Eevee

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

untitled.blend

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce GT 525M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 391.35 **Blender Version** Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-01-24 23:16, hash: `cf6d17a6aa` Caused by bbe6d44928 **Short description of error** Sculpt Vertex Color doesn't appear in Cycles viewport or render and sometimes Blender crashes but works fine in Eevee **Exact steps for others to reproduce the error** [Please describe the exact steps needed to reproduce the issue] [Based on the default startup or an attached .blend file (as simple as possible)] [untitled.blend](https://archive.blender.org/developer/F9597155/untitled.blend)

Ahmed commented

2021-01-25 17:20:51 +01:00

Added subscriber: @AhmedNassef

Philipp Oeser commented

2021-01-26 09:55:59 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-01-26 09:55:59 +01:00

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

Philipp Oeser commented

2021-01-26 09:55:59 +01:00

Can confirm.
Looks like this here in Renderer viewport:

whereas Eevee renders like this

Upon rendering in Cycles, I get the following Assert:

blender: intern/cycles/render/attribute.cpp:155: void ccl::Attribute::set_data_from(ccl::Attribute&&): Assertion `other.element == element' failed.

Can confirm. Looks like this here in Renderer viewport: ![image.png](https://archive.blender.org/developer/F9598361/image.png) whereas Eevee renders like this ![image.png](https://archive.blender.org/developer/F9598363/image.png) Upon rendering in Cycles, I get the following Assert: ``` blender: intern/cycles/render/attribute.cpp:155: void ccl::Attribute::set_data_from(ccl::Attribute&&): Assertion `other.element == element' failed. ```

Philipp Oeser commented

2021-01-26 11:11:20 +01:00

Thing is that sculpt vertex colors are ATTR_STD_VERTEX_COLOR -- but with ATTR_ELEMENT_VERTEX instead of the expected ATTR_ELEMENT_CORNER_BYTE for regular vertex colors.
Got a fix, but unsure if this is the right way to go.

Thing is that **sculpt** vertex colors are `ATTR_STD_VERTEX_COLOR` -- but with `ATTR_ELEMENT_VERTEX` instead of the expected `ATTR_ELEMENT_CORNER_BYTE` for **regular** vertex colors. Got a fix, but unsure if this is the right way to go.

Philipp Oeser changed title from ~~Sculpt Vertex Color Bug~~ to Cycles Sculpt Vertex Color crash or wrong render

2021-01-26 11:27:30 +01:00

blender-admin commented

2021-01-26 15:14:29 +01:00

This issue was referenced by c51a5b204c

This issue was referenced by c51a5b204cc15d079dd319bd95296f5ebe4922c9

Brecht Van Lommel commented

2021-01-26 15:47:12 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Brecht Van Lommel closed this issue

2021-01-26 15:47:12 +01:00

Brecht Van Lommel self-assigned this 2021-01-26 15:47:12 +01:00

Thomas Dinges added this to the 2.93 LTS milestone 2023-02-07 18:46:38 +01:00

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Cycles Sculpt Vertex Color crash or wrong render #85048