Cycles culling broken when using material assign node (GeoNodes) #90029

New Issue

user1 · 2021-07-21T23:05:44+02:00

user1 commented

2021-07-21 23:05:44 +02:00

System Information
Operating system: Linux-5.4.0-77-generic-x86_64-with-glibc2.27 64 Bits
Graphics card: GeForce GT 630/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.143

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-19 22:41, hash: 24aae7ed63
Worked: (newest version of Blender that worked as expected)

Short description of error
https://www.youtube.com/watch?v=ExHwhB0wx1c

Open Blender
Switch into Cycles (rendered view mode) in the 3dview editor
Mute/unmute the material assign node in the node editor
Observe the culling

Cycles culling bug.blend

**System Information** Operating system: Linux-5.4.0-77-generic-x86_64-with-glibc2.27 64 Bits Graphics card: GeForce GT 630/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.143 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-19 22:41, hash: `24aae7ed63` Worked: (newest version of Blender that worked as expected) **Short description of error** https://www.youtube.com/watch?v=ExHwhB0wx1c Open Blender Switch into Cycles (rendered view mode) in the 3dview editor Mute/unmute the material assign node in the node editor Observe the culling ![Bildschirmfoto zu 2021-07-21 23-04-38.png](https://archive.blender.org/developer/F10232506/Bildschirmfoto_zu_2021-07-21_23-04-38.png) ![Bildschirmfoto zu 2021-07-21 23-04-30.png](https://archive.blender.org/developer/F10232505/Bildschirmfoto_zu_2021-07-21_23-04-30.png) [Cycles culling bug.blend](https://archive.blender.org/developer/F10232509/Cycles_culling_bug.blend)

user1 commented

2021-07-21 23:05:44 +02:00

Added subscriber: @user1

Hans Goudey commented

2021-07-21 23:14:51 +02:00

Added subscriber: @HooglyBoogly

Hans Goudey commented

2021-07-21 23:14:51 +02:00

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

Hans Goudey closed this issue

2021-07-21 23:14:51 +02:00

Hans Goudey commented

2021-07-21 23:14:51 +02:00

Thanks for the report, however, this is not a bug. The material assign node has to combine all of the instanced objects into a single mesh to change the material, so there are no smaller objects to cull.
For now there isn't really a workaround here as far as I know. To change materials on instances you have to make them real geometry.

Thanks for the report, however, this is not a bug. The material assign node has to combine all of the instanced objects into a single mesh to change the material, so there are no smaller objects to cull. For now there isn't really a workaround here as far as I know. To change materials on instances you have to make them real geometry.

user1 commented

2021-07-21 23:49:28 +02:00

Short after 3.0 is out, i predict there will be GeoNode solutions at Blendswap for culling both in Eevee and Cycles, so no big problem. Nevermind please, and go on being awesome!

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Cycles culling broken when using material assign node (GeoNodes) #90029