Cycles OptiX portal area light toggle error #85023
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Reference: blender/blender#85023
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System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.09
Blender Version
Broken:
version: 2.90.1
version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash:
0f45cab862
version: 2.92.0 Beta, branch: master, commit date: 2021-01-22 18:24, hash:
a1f44e43a2
version: 2.93.0 Alpha, branch: master, commit date: 2021-01-17 11:35, hash:
4ef0654449
version: 2.93.0 Alpha, branch: master, commit date: 2021-01-24 23:16, hash:
cf6d17a6aa
Worked: Never
Short description of error
When Area light portal toggle is switched on, while using Cycles with OptiX and Rendered Viewport shading, error occurs:
After that you can just switch to other Viewport shading and back to Rendered and it works normally.
Works with CUDA renderer, so it's just OptiX specific.
Also, when I disable my GeForce in OptiX properties and enable Intel Core, the everything works properly. It might be connected with Nvidia cards or GTX 1050ti.
Exact steps for others to reproduce the error
Added subscriber: @ZahoTo
#85108 was marked as duplicate of this issue
Changed status from 'Needs Triage' to: 'Confirmed'
Added subscriber: @ChrisGraz
Added subscribers: @pmoursnv, @brecht
@pmoursnv, toggling the portal means
requested_features.use_background_light
changes, and I see the OptiX kernels being reloaded in response to that. But somehow it still gives an error.It's not clear to me why this fails, while adding e.g. SSS or an AO node seems to reload the kernels without error. Maybe background shader evaluation is different because it happens as part of scene update rather than rendering.
Portal Area light toggle Errorto Cycles OptiX portal area light toggle error@brecht I don't see
requested_features.use_background_light
changing when toggling portal. The problem appears to be that kernels are reloaded before the background light is enabled again (which happens inLightManager::test_enabled_lights
, which is called after the kernel reload):Starting with Portal off
Changed status from 'Confirmed' to: 'Resolved'
Appears to be solved in Blender 3.0.