ID:181656
 
I really need a free program that can rezise some 16*16 icons into 32*32 without distortion. Thank you :D .
When resizing bitmap images from a smaller form into a larger form you're going to get distortion no matter what you do, upscaling simply doesn't turn out perfect.

Using vector graphics (which BYOND doesn't support) doesn't have this problem.
What sort of distortion don't you want?

I personally like the "pixelated" style better than the interpolating style -- but both styles (and much more) can be accomplished using ImageMagick.
I like to use GIMP