Christensen-Burley rendering differences on scaled objects #92255

Closed
opened 2021-10-16 03:13:28 +02:00 by Fer Galicia · 10 comments

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: Radeon (TM) RX 470 Graphics ATI Technologies Inc. 4.5.14761 Core Profile Context 21.10.1 30.0.13025.1000

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-10-12 22:43, hash: 53af51ad50
Worked: Prior to Cycles-X merge

Short description of error
Christensen-Burley make the materials dark in cycles if the mesh have been scaled up or down without applying the scale transformation.

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)]

I recently opened an old file (happen on most other files) on this Alpha version and I noticed that some of my meshes with SSS materials looked darker but not all of them even if some were using the same material.

After looking around the difference between meshes I realize it was happening only to the meshes that I had scale up or down but didn't applied scale transformation, so when I did applied the scale transformation it fixed the bug until the mesh was scaled again, but I was wondering if it would be an issue if my meshes are scaled during an animation and I wouldn't be able to fix it since the mesh would look dark even if I change the Subsurface amount to the smallest value.

Also please don't remove Christensen-Burley, if I use a bevel shader with sss it doesn't work right with any on the random walks, thanks!

Edit: I just check again and if you scale only one axis (ex. press S to scale then Y) only the faces on that axis get darker if either you scale up or down. Weird

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: Radeon (TM) RX 470 Graphics ATI Technologies Inc. 4.5.14761 Core Profile Context 21.10.1 30.0.13025.1000 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-10-12 22:43, hash: `53af51ad50` Worked: Prior to Cycles-X merge **Short description of error** Christensen-Burley make the materials dark in cycles if the mesh have been scaled up or down without applying the scale transformation. **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)] I recently opened an old file (happen on most other files) on this Alpha version and I noticed that some of my meshes with SSS materials looked darker but not all of them even if some were using the same material. After looking around the difference between meshes I realize it was happening only to the meshes that I had scale up or down but didn't applied scale transformation, so when I did applied the scale transformation it fixed the bug until the mesh was scaled again, but I was wondering if it would be an issue if my meshes are scaled during an animation and I wouldn't be able to fix it since the mesh would look dark even if I change the Subsurface amount to the smallest value. Also please don't remove Christensen-Burley, if I use a bevel shader with sss it doesn't work right with any on the random walks, thanks! Edit: I just check again and if you scale only one axis (ex. press S to scale then Y) only the faces on that axis get darker if either you scale up or down. Weird
Author

Added subscriber: @fergaliciaart

Added subscriber: @fergaliciaart
Member

Added subscribers: @brecht, @Alaska

Added subscribers: @brecht, @Alaska
Member

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

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

Marking as confirmed when comparing it to Christensen-Burley from before the Cycles-X merge.

CC @brecht as you worked on the code.

System Information
Operating system: Linux-5.14.0-2-amd64-x86_64-with-glibc2.33 64 Bits
Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 470.63.01

Blender Version: 3.0.0 Alpha, branch: master, commit date: 2021-10-16 04:35, hash: 1c18f05f0b

Marking as confirmed when comparing it to `Christensen-Burley` from before the Cycles-X merge. CC @brecht as you worked on the code. **System Information** Operating system: Linux-5.14.0-2-amd64-x86_64-with-glibc2.33 64 Bits Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 470.63.01 Blender Version: 3.0.0 Alpha, branch: master, commit date: 2021-10-16 04:35, hash: `1c18f05f0b`
Alaska changed title from Christensen-Burley bug (or new feature) to Christensen-Burley rendering differences on scaled objects 2021-10-16 08:25:23 +02:00

Added subscriber: @ZackMercury-2

Added subscriber: @ZackMercury-2
Member

Added subscriber: @leesonw

Added subscriber: @leesonw
Member

Marking as high to ensure this gets looked at and potentionally fixed before 3.0 releases

Marking as high to ensure this gets looked at and potentionally fixed before 3.0 releases

This issue was referenced by blender/cycles@5bad1fbee0

This issue was referenced by blender/cycles@5bad1fbee092ffed88ce7058faf9346f33eb86c4

This issue was referenced by f2cc38a62b

This issue was referenced by f2cc38a62b50b0819cd23a44399c40d5d8b466d1

Changed status from 'Confirmed' to: 'Resolved'

Changed status from 'Confirmed' to: 'Resolved'
Brecht Van Lommel self-assigned this 2021-10-28 22:22:00 +02:00
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Reference: blender/blender#92255
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