Do you think its possible to unwrap these 2d planets into projected texture (ie equirectangular projection or mercator?), or is there too much shader magic going on for that lol? I think it'd be interesting if so!
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It's definitely possible to create some kind of rectangular map from them, but to be honest, I don't know what projection that would be. Currently the shader works by starting with a flat texture, and then applying a kind of 'spheriphication' filter on it. So if you just don't do that you would have a map