Hello, I need to generate a sprite sheet with squared sprite for a 2D game. How can I generate a sprite sheet where each frame has x = y? The only think I have to do is to "insert" some blank space between sprites (in case y were > x in the original sprite). Is there any program that I can use to trasform "irregular" sprite sheets to "squared" sprite sheets?

I would just dive in with an image editor and change the spacing manually.

Thanks for the answer but for many sprites it's very annoying! I've found a solution with Image Magick and its advanced command-line tool! If there are people interested, details are in this post : http://gamedev.stackexchange.com/questions/37198/sprite-sheet-generator

I would just dive in with an image editor and change the spacing manually.

I'd write a program to do it for me. ;)