Two materials: volumetric being in second slot causes error in EEVEE #83538

New Issue

Wilbur Jaywright · 2020-12-08T04:20:54+01:00

Wilbur Jaywright commented

2020-12-08 04:20:54 +01:00

System Information
Operating system: Windows 10 64 bit
Graphics card: Intel HD Graphics

Blender Version
Broken: 2.90.1
Worked: IDK, but I've been using blender since 2.79 and have not encountered this problem when I have done this kind of thing.

Short description of error
When I have a mesh object that has both solid and Volume Scatter materials on it (in different slots), in EEVEE, the volumetric material only works if it is not in the second slot. If it is in the second slot (top down), it causes the black "shader missing" to be applied. Moving the volume slot up to the top with the solid material in the slot at the bottom causes normal operation.

Exact steps for others to reproduce the error
Go into edit mode on the default cube.
Duplicate the mesh, but leave it at 0 0 0. Scale the duplicate up a little.
Create a second material slot, and assign the duplicate larger cube to it. Leave edit mode.
Create a "Volume Scatter" material for the second slot. The outer cube will turn black.
Move volumetric material up in list of materials. The outer cube will change to the proper fuzzy grey.

#83538.blend

**System Information** Operating system: Windows 10 64 bit Graphics card: Intel HD Graphics **Blender Version** Broken: 2.90.1 Worked: IDK, but I've been using blender since 2.79 and have not encountered this problem when I have done this kind of thing. **Short description of error** When I have a mesh object that has both solid and Volume Scatter materials on it (in different slots), in EEVEE, the volumetric material only works if it is not in the second slot. If it is in the second slot (top down), it causes the black "shader missing" to be applied. Moving the volume slot up to the top with the solid material in the slot at the bottom causes normal operation. **Exact steps for others to reproduce the error** Go into edit mode on the default cube. Duplicate the mesh, but leave it at 0 0 0. Scale the duplicate up a little. Create a second material slot, and assign the duplicate larger cube to it. Leave edit mode. Create a "Volume Scatter" material for the second slot. The outer cube will turn black. Move volumetric material up in list of materials. The outer cube will change to the proper fuzzy grey. [#83538.blend](https://archive.blender.org/developer/F9502790/T83538.blend)

Wilbur Jaywright commented

2020-12-08 04:20:54 +01:00

Added subscriber: @zargul

Richard Antalik commented

2020-12-11 15:38:40 +01:00

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

Greg Neumiller commented

2021-01-03 21:40:00 +01:00

Added subscriber: @rlneumiller

Greg Neumiller commented

2021-01-03 21:40:00 +01:00

Confirmed that this does not reproduce in 2.79 (cycles).
Reproduces in version 2.80, 2.90, 2.90.0, 2.91 (tested eevee and cycles).
Reproduces in version 2.92@ 1e8f266591 (only tested eevee).

Confirmed that this does not reproduce in 2.79 (cycles). Reproduces in version 2.80, 2.90, 2.90.0, 2.91 (tested eevee and cycles). Reproduces in version 2.92@ 1e8f266591 (only tested eevee).

Philipp Oeser removed the

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Two materials: volumetric being in second slot causes error in EEVEE #83538