Materials to Vertex Groups?

Support Materials and Textures
1

Hello friends. I’m wondering if anybody knows of a script or tool that would automatically take every material on an object and create a vertex group from the verts assigned to that material. Any ideas or suggestions would be most welcome.

2

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Bit tedious to set up, until we have loops, but geonodes can do this.

Hope that helps.

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3

Hey AC, thank you so much for this! It’s very helpful. It will also get me to dig into geo nodes and the spreadsheet, some things I need to do.

I can’t quite read the text on these nodes in your image, so I’ll start digging. Thanks again!

4

Material Selection, Seperate Geometry, Store Named Attribute. From left to right

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6

Many thanks

7

Many thanks!

8

Sorry to come back, but I think there might be something I’m missing.

I’m trying it like in the diagram with just one material from the mesh. It creates a group that I can see in the spreadsheet. But there is no listing in Object Data Properties/Vertex Groups list. Shouldn’t it be listed there?

Again, any help or advice is most welcome.

9

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Hi,

You can overwrite already added Vertex Groups like this. But you cannot create them from inside GN afaik.

But, depending on how you want to use the information, example…

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In the shader editor.