Thanks for the reply! I wondered if it was baked lighting. I still haven't gotten around to learning how to use it. I wanted to use it for my currently game jam game, but got a little intimidated by setting up UVs. I typically texture my 3D art by creating a color palette and just kind of crushing the UVs into the color I want.
I didn't know more than one directional light could be used. That is interesting!
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That's good to know! I didn't realize Godot would generate UVs. I assumed that the UV2 slot would just be a copy of the regular UVs, which in my case would probably be too compressed to have good looking light maps.
The other concern I had is that all of the assets in my game, minus the enemies and some glass, all use the exact same SpatialMaterial. I wasn't sure if that would cause an issue either.
I'll give this a try next time I have the chance! Thank you. :)