Mesh to Volume don't take Geometry Nodes result into acount. #84799

New Issue

Florian Delarque · 2021-01-17T12:15:30+01:00

Florian Delarque commented

2021-01-17 12:15:30 +01:00

System Information
Operating system: Windows 10 Professionnal 19042.746
Graphics card: NVIDIA GeForce RTX 2060

Blender Version
Broken: 2.92.0 Beta

Short description of error
Mesh to Volume don't take Geometry Nodes result into acount.

Exact steps for others to reproduce the error
Step 1 : Create a torus
Step 2 : Create a sphere
Step 3 : Add Geometry Node modifier on torus to distribute and instance the sphere on the torus with random on scale attribute.
Step 4 : Create an empty volume
Step 5 : Add a Mesh to Volume on it, and select the torus as the source for the volume.

Result : The torus is converted to volume but don't take the geometry node result into acount.

Attached file
MeshToVolume_NoGeometryNode.blend

Thanks for all of your work :)

**System Information** Operating system: Windows 10 Professionnal 19042.746 Graphics card: NVIDIA GeForce RTX 2060 **Blender Version** Broken: 2.92.0 Beta **Short description of error** Mesh to Volume don't take Geometry Nodes result into acount. **Exact steps for others to reproduce the error** Step 1 : Create a torus Step 2 : Create a sphere Step 3 : Add Geometry Node modifier on torus to distribute and instance the sphere on the torus with random on scale attribute. Step 4 : Create an empty volume Step 5 : Add a Mesh to Volume on it, and select the torus as the source for the volume. - > Result : The torus is converted to volume but don't take the geometry node result into acount. **Attached file** [MeshToVolume_NoGeometryNode.blend](https://archive.blender.org/developer/F9582989/MeshToVolume_NoGeometryNode.blend) Thanks for all of your work :)

Florian Delarque commented

2021-01-17 12:15:30 +01:00

Added subscriber: @Chokmah

Paul Szajner commented

2021-01-18 00:59:14 +01:00

Added subscriber: @sozap

Paul Szajner commented

2021-01-18 00:59:14 +01:00

I think this is expected behavior for now, instances aren't influenced by modifiers. If you put a modifier after the geometry node modifier the instances aren't taken into account.
I think it's not a bug , but either a known issue or something to be done latter ...

I think this is expected behavior for now, instances aren't influenced by modifiers. If you put a modifier after the geometry node modifier the instances aren't taken into account. I think it's not a bug , but either a known issue or something to be done latter ...

Robert Guetzkow commented

2021-01-18 12:16:39 +01:00

Added subscribers: @JacquesLucke, @rjg

Robert Guetzkow commented

2021-01-18 12:16:39 +01:00

It matches the behavior of the older instancing system which also does not affect the shape generated by the Mesh to Volume modifier on the volume object. On the other hand modifiers on the torus that generate geometry (e.g. Array modifier) are taken into account. I'm not sure if geometry nodes (un)intentionally deviate from the semantics of the modifiers or if this is a known limitation of the Mesh to Volume modifier.

CC @JacquesLucke?

It matches the behavior of the older instancing system which also does not affect the shape generated by the *Mesh to Volume* modifier on the volume object. On the other hand modifiers on the torus that generate geometry (e.g. Array modifier) are taken into account. I'm not sure if geometry nodes (un)intentionally deviate from the semantics of the modifiers or if this is a known limitation of the *Mesh to Volume* modifier. CC @JacquesLucke?

Jacques Lucke commented

2021-01-18 12:23:30 +01:00

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

Jacques Lucke closed this issue

2021-01-18 12:23:30 +01:00

Jacques Lucke commented

2021-01-18 12:23:30 +01:00

Right, this is a limitation currently. Most code is not aware of these instances yet.

Florian Delarque commented

2021-01-18 13:25:08 +01:00

Hello :)

OK I'll take a note about it.

Thank youy for all of your work :)

Hello :) OK I'll take a note about it. Thank youy for all of your work :)

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Mesh to Volume don't take Geometry Nodes result into acount. #84799