Haven't had much time for programming the last two days, but I've managed to throw this together so far:

The sprite:


With 4x4 pixels boxes (can be set to any size):


You can click on boxes to remove them in order to "fine tune" the result. Now I just need to join the boxes into larger boxes. I believe a pretty simple algorithm can do this. And then output the coordinates of the boxes to a file I can then copy/paste into my game.

I'm currently having trouble getting the alpha value of pixels, though: http://www.pascalgamedevelopment.com...=5915.msg48074