Eevee: Principled volume shader set on Geonodes Volume Cube node gives unexpected result #99003

New Issue

Rygel · 2022-06-20T04:15:33+02:00

Rygel commented

2022-06-20 04:15:33 +02:00

System Information
Operating system: Linux 5.10.117-1-MANJARO
Graphics card: AMD ATI Radeon RX580

Blender Version
Broken: 3.3.0 alpha

Short description of error

Principled volume shader in eevee creates an additional layer of density on volumes created by Volume Cube node. Volume scatter and Volume Absorption work as expected, as does rendering on cycles. One thing of note is that the unwanted cube maintains its position when changing the bounds of the volume cube.

Exact steps for others to reproduce the error

Create volume on geometry nodes with Volume Cube node, set density to 0. Add principled volume material with non-zero density. With appropriate eevee volumetric settings, the effect should be apparent.

smoke_bug.blend

**System Information** Operating system: Linux 5.10.117-1-MANJARO Graphics card: AMD ATI Radeon RX580 **Blender Version** Broken: 3.3.0 alpha **Short description of error** Principled volume shader in eevee creates an additional layer of density on volumes created by Volume Cube node. Volume scatter and Volume Absorption work as expected, as does rendering on cycles. One thing of note is that the unwanted cube maintains its position when changing the bounds of the volume cube. **Exact steps for others to reproduce the error** Create volume on geometry nodes with Volume Cube node, set density to 0. Add principled volume material with non-zero density. With appropriate eevee volumetric settings, the effect should be apparent. ![image.png](https://archive.blender.org/developer/F13205247/image.png) [smoke_bug.blend](https://archive.blender.org/developer/F13205249/smoke_bug.blend)

Rygel commented

2022-06-20 04:15:33 +02:00

Added subscriber: @rygelXVI

blender-admin commented

2022-06-20 04:15:33 +02:00

#100089 was marked as duplicate of this issue

Pratik Borhade commented

2022-06-20 05:36:31 +02:00

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

Pratik Borhade commented

2022-06-20 05:36:33 +02:00

Added subscriber: @PratikPB2123

Jacques Lucke commented

2022-07-26 13:51:00 +02:00

Added subscribers: @fclem, @JacquesLucke

Jacques Lucke commented

2022-07-26 13:51:00 +02:00

Can reproduce as well. No idea where that extra volume is coming from yet.
cc @fclem

Note, this is unrelated to the Volume Cube node. I can reproduce the same issue with a Points to Volume node.

Can reproduce as well. No idea where that extra volume is coming from yet. cc @fclem Note, this is unrelated to the Volume Cube node. I can reproduce the same issue with a Points to Volume node.

Pratik Borhade commented

2022-08-01 03:38:25 +02:00

Added subscriber: @mod_moder

Sun Kim commented

2022-10-24 08:26:41 +02:00

Added subscriber: @persun

Sun Kim commented

2022-10-24 09:29:42 +02:00

I guess EEVEE creates volume on texture space no matter what if the object has a volume shader.

An example of a simple curve object with bevel, with texture space displayed.

EEVEE renders volume based on the original mesh's texture space even if the GN output is empty.

You can also try manually remove all mesh in edit mode, EEVEE will still render default cube size volume.

I guess EEVEE creates volume on texture space no matter what if the object has a volume shader. An example of a simple curve object with bevel, with texture space displayed. ![CurveVolumeShader.jpg](https://archive.blender.org/developer/F13756024/CurveVolumeShader.jpg) EEVEE renders volume based on the original mesh's texture space even if the GN output is empty. ![VolumeOnEmptyMesh.jpg](https://archive.blender.org/developer/F13756047/VolumeOnEmptyMesh.jpg) You can also try manually remove all mesh in edit mode, EEVEE will still render default cube size volume.

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Eevee: Principled volume shader set on Geonodes Volume Cube node gives unexpected result #99003