Remesh modifier after a Geometry Nodes modifier destroys the material #96499

New Issue

kursad k · 2022-03-15T18:01:03+01:00

kursad k commented

2022-03-15 18:01:03 +01:00

System Information
Operating system: Win 10
Graphics card:

Blender Version
Broken: 3.2.0 fc259d4c30

Short description of error
Adding a Remesh modifier destorys the materials either coming from a geonodes material assigment or from the object's own material assignments, makes itt impossible to assign a material.

blender_z5bz6pFiOX.mp4

Load the attached .blend file
Enable and disable the remesh modifier to see what happens with the material

no_mat_15032022_1156_53.blend

**System Information** Operating system: Win 10 Graphics card: **Blender Version** Broken: 3.2.0 fc259d4c30cb **Short description of error** Adding a Remesh modifier destorys the materials either coming from a geonodes material assigment or from the object's own material assignments, makes itt impossible to assign a material. [blender_z5bz6pFiOX.mp4](https://archive.blender.org/developer/F12928951/blender_z5bz6pFiOX.mp4) Load the attached .blend file Enable and disable the remesh modifier to see what happens with the material [no_mat_15032022_1156_53.blend](https://archive.blender.org/developer/F12928952/no_mat_15032022_1156_53.blend)

kursad k commented

2022-03-15 18:01:03 +01:00

Added subscriber: @kursadk

Hans Goudey commented

2022-03-15 18:10:36 +01:00

Added subscriber: @HooglyBoogly

Hans Goudey commented

2022-03-15 18:10:36 +01:00

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

Hans Goudey commented

2022-03-15 18:10:36 +01:00

Thanks for the report. This is basically a performance tradeoff with the remesh modifier. It doesn't transfer attributes to its result.
However, this isn't noted at all in the documentation, so I'll call this a bug that can be fixed by adding that information to the manual page.

Thanks for the report. This is basically a performance tradeoff with the remesh modifier. It doesn't transfer attributes to its result. However, this isn't noted at all in the documentation, so I'll call this a bug that can be fixed by adding that information to the manual page.

kursad k commented

2022-03-15 18:26:34 +01:00

This seems to be an issue if the materials applied to at the data block rather than the object level.

Hans Goudey commented

2022-03-15 22:09:57 +01:00

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

Hans Goudey commented

2022-03-15 22:09:57 +01:00

Hmm, yeah, I think I jumped to that conclusion a bit too fast. This would work if the remesh node transferred material indices, but there might be another reason it doesn't work too.

Hmm, yeah, I think I jumped to that conclusion a bit too fast. This *would* work if the remesh node transferred material indices, but there might be another reason it doesn't work too.

Richard Antalik commented

2022-03-15 23:46:41 +01:00

Added subscriber: @iss

Richard Antalik commented

2022-03-15 23:46:41 +01:00

From what I can see, after geometry nodes, there is no material assigned to mesh. Set Material node does assign material to faces. Therefore remesh modifier does not have any material to transfer to new mesh.

So I think the original conclusion was correct.

From what I can see, after geometry nodes, there is no material assigned to mesh. Set Material node does assign material to faces. Therefore remesh modifier does not have any material to transfer to new mesh. So I think the original conclusion was correct.

Pratik Borhade commented

2022-03-18 12:03:27 +01:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-03-18 12:03:27 +01:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Pratik Borhade commented

2022-03-18 12:03:27 +01:00

@HooglyBoogly hi, isn't this issue same as the other report: #93455 (Set Material Node does not reuse existing empty slot)

Paul Jacques Yves GUILBERT commented

2022-03-18 20:13:04 +01:00

Added subscriber: @PJYG

Paul Jacques Yves GUILBERT commented

2022-03-18 20:13:04 +01:00

I don't know if it's helping, but on the "user" side of things a quick workaround seems to be adding a second geometry node after the remesh to set the material.2022-03-18 20-08-30.mp4

I don't know if it's helping, but on the "user" side of things a quick workaround seems to be adding a second geometry node after the remesh to set the material.[2022-03-18 20-08-30.mp4](https://archive.blender.org/developer/F12933644/2022-03-18_20-08-30.mp4)

Hans Goudey commented

2022-03-21 15:51:14 +01:00

Oh yes, it is! The "Set Material" node adds the material and uses material_index=1. The remesh modifier doesn't transfer material_index, so the result uses the default value of 0.

Oh yes, it is! The "Set Material" node adds the material and uses `material_index=1`. The remesh modifier doesn't transfer `material_index`, so the result uses the default value of 0.

Hans Goudey commented

2022-03-21 15:51:29 +01:00

Closed as duplicate of #93455

Hans Goudey closed this issue

2022-03-21 15:51:29 +01:00

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Remesh modifier after a Geometry Nodes modifier destroys the material #96499