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UV's generated using Geometry Nodes are stored as attributes, not as UV's, meaning they are not exported and cannot be edited in the UV editor.

In Blender 3.1 there was an operator to convert attribute UV's into UV maps. See the parameter mode "UV_MAP"

This has since been removed, and I can't currently find a way to convert attribute UV's to UV maps.

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    $\begingroup$ in Blender 3.6, you still can use the UI as in previous versions. It's in the the Data Properties tab > Attributes. There you can use the Convert Attribute dropdown menu. Have a look here: 2.2 Create the UV Map $\endgroup$
    – Blunder
    Aug 14 at 22:58
  • $\begingroup$ Thanks @Blunder, this is indeed a duplicate. And here is a short video showing the steps: youtube.com/watch?v=Q8oopkJXE4o $\endgroup$
    – quellenform ♦
    Aug 15 at 8:52

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Since version 3.5 there is the possibility in Geometry Nodes to save data not only as Vector in the geometry, but also as 2D Vector:

enter image description here

This also has to do with the fact that since this version UVMaps are treated as attributes, and thus a seamless transfer of the saved values is possible by simply applying the Geometry Nodes modifier afterwards, and thus all values that you have saved as 2D Vector are automatically treated as UVMap:

enter image description here

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  • $\begingroup$ GN's steady progress towards cleanliness :) $\endgroup$
    – Robin Betts ♦
    Aug 24 at 11:29
  • $\begingroup$ I recently noticed this 2D in choices too, but I didn't think to try if the UV works now. And it was the case for the long time since 3.5! Perhaps we should somehow link to/from this? How to apply Geometry Nodes with UV maps? $\endgroup$
    – Markus von Broady
    Aug 24 at 12:40

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