I've been using gimp lately. Question for you: I tried mixing your old orc set with the new one (I was trying to put a tower of Sauron in for the LotM). I wasn't able to use colors from the blue set with the red one. Are the color pallettes limited to the ones used or something?
My work around is to open a city of yours with the colors I want, and paste into it from elsewhere. But I wondered if there was something I wasn't seeing.
Btw, forgive me, because your work is truly art, but I edited your orc walled city. Of course I did it by using your own structures from the same set cause the city is just awesomeness. I tried to make it a little more LotM.
Your stuff is so good I actually stopped playing civ and spent hours tooling around in gimp playing with your cities. My eyes are currently bloodshot to hell. It says something when the game is fun to play just to see someone's artwork in it.
Btw, I see u working on an elf set. I sometimes use the pink byzantine set for the elves, it seems to fit (for my tastes anyways).
Looking forward to your next piece!