[2020] Error in Theme Editor

Definitely try with the launch options. But I also wonder what format is your texture, what color settings does it use and what resolution is it. Those things could all be what's causing problems.

Cities takes both .png and .jpeg for textures just fine. I've actually never used .dds. :P Resolutions should be fine and RGB should be too. Might be worth trying different settings for RGB - 8 bit, 16 bit and so on. I think there might be something with that being a problem, but I can't remember what's the default that I use.

Originally posted by wayfray: I'm getting the same error message when trying to upload normal maps I've authored in photoshop. Changing the file mode to 8 bit or 16 bit didn't help.

Interestingly, the textures i've extracted from the game won't load in photoshop (although they do load in Windows preview). It does seem to be a format issue of some kind.

What color mode are you using?

That's very strange! Try making a new empty image in the correct resolution, open your texture in another window, select everything and copy it into the new one you created. Save that and see if that works.

Oh and what resolution is your image?