I understand the whole power of 2 idea and how all your graphics should be a power of 2, to increase performance of your games, but there's something I'd like to know, regarding transparency.
I get that you need to use as little transparency as possible in your sprites and you can crop out any transparency around your sprites, but by cropping the transparency, it will change the sprite's size. Do your sprites only need to be imported at a power of 2 size, then you can scale them down to whatever size you want? Or do your sprites have to stay at a power of 2 size, even when cropping out transparency in engine?
Thanks for any advice anyone might have!