Random Walk subsurface appearance in OptiX does not match other engines #74939
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Reference: blender/blender#74939
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System Information
Operating system: Windows 10 (1909)
Graphics card: Nvidia RTX 2060
Blender Version
Broken: Presumably all versions including OptiX (earliest tested: 2.82, latest tested: 2.83,
42012493a8, master, 2020-03-19)Short description of error
Random Walk subsurface materials appear significantly less saturated with the OptiX Cycles engine compared to CUDA and CPU, however Christensen-Burley materials render as expected.
Exact steps for others to reproduce the error
Open attached blend file (or add Principled BSDF/Subsurface Scattering BSSRDF with Random Walk to any object). Render with CUDA/CPU, then with OptiX, and compare.
CUDA
OptiX
SuzanneSkin.blend
system-info.txt
Added subscriber: @SamGreen
Added subscriber: @pmoursnv
This issue was referenced by blender/cycles@3b1e70d0ac
This issue was referenced by
bd2b1a67a7Changed status from 'Needs Triage' to: 'Confirmed'
Changed status from 'Confirmed' to: 'Resolved'