KKasumiAug 4, 2014 at 5:49 am
Today I learned reidentify layer tiles will make a "flipped tile" with its own unique index into a different index tile that matches it. (Tile 36 and Tile 82 are identical, except horizontally flipped. Tile 82 will become tile 36 flipped X.) This caused me to panic and make me think the tilemap importer I wrote was broken. Made me panic more when I realized I might have accidentally done this at any point (with a remove unused tiles afterwards), and may be using more tiles than I'm actually allowed.
I figure an option to disallow them entirely is better than adding a dialog box to "reidentify layer tiles" that makes you choose whether you want transformations. Because the average user wouldn't care about this, and I'd rather make me do extra stuff as a result, not them.

DanikAug 8, 2014 at 7:38 am
Yeah, that's a problem if you want to keep transformed copies of tiles. There should definitely be a dialog for the operation, and it should probably also prefer non-transformed tile matches if they exist.