Manually editing lightmaps

Archived Forums Questions & Answers
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Is there a way to manually edit lightmaps generated in Unity? We’d have to see the corellation between the generated scene UVs(UV map2) and their location on the generated lightmap texutre. Currently theres no way to see the generated UV2 map in Unity, amirite?

Same problem here

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2 Answers

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You should be able to edit them in photoshop or any program that lets you edit .exr files.

The problem I see though is that when Unity generates the 2nd UV, you cannot select a face or whatever and see which section of lightmap to edit, you'd have to paint on it, then go back in forth, trial and error style until you found the right area of lightmap to edit. Doable, yes, cumbersome and unwieldly, yes.

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I can't think of a tool that let's you edit light map files in Unity like you want to.

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You can provide your own UVs for lightmapping, if you find it’s worth the trouble.

Past that, you could always write a script to export the UVs to another program. This ObjExporter script might be a good start point.