I was about to make some custom Start Orbs. I was wandering what was the difference between BMP and PNG when it came to Start Orbs. Would it even matter which one you used? Because I usually use the PNG file when choosing my Start Orb. I don't see a difference when using a BMP file though.
Another question: I get my Start Orbs from DeviantART. I was wandering, why do people include so many Start Orb PNG and BMP files. For an example in my picture. Is there a diffidence of them?