Sorry for double posting. It seems save and then loading the data in Flex 2 for the sprite results in the sprite looking the same as it does in SonMapED. I tried reimporting the art from png, but the art imported incorrectly, and like before saving and loading further messed it up. It's definitely a problem with the tiles and not the mappings or DPLC's. Edit: The problem doesn't happen when using a Bitmap image. Edit 2: Is there a way to get rid of the window that comes up when you create mappings. It covers a large amount of the space, making editing very difficult. Edit 3: It would be useful if there was an option to clone mappings within a single sprite.