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Hi, how are you? I usually use Paint.NET to work with textures; I like to recolor units and skirts. I choose BC1/DXT1 for them, but it's not suitable for small icons. Which option should I choose?
Which option should you choose? If the suggested (uncompressed) working option doesn't suit the textures you're having trouble with, try everything.
P.S. If you still can't get it to work, I can console you by saying that those textures are bad. They have a lot of details, and everything is small and messy. They are worse than the originals.