I figured it out. You have to have a copy and the original. Leave the original as indexed color, and copy can change to RGB color. whenever you make a change, just copy paste to the original from the copy, and save as normal. This works for me.
I used Facts to make a bmp of a tileset from a map I had. And I edited the bmp in photoshop. I don't know what to save the bmp as, I try saving as indexed and it messes up the tiles(makes small lines at the top.). I just want to know if any of you could help me.
I need someone that is good at making tilesets to help me... I need to get some medieval looking tilesets.. I'm looking for some kinda like merc samurai's.. I would appreciate any help... I also need lvlz if you could help with that...