i probably missed something, could any1 help?

just do the setpng and hand me the wad again? :3
wait, what? I'm sure i've done that before... that batch image converter thing i wrote runs setpng on RGB pngs (to set the grab chunk) and they seemed to work fine...the PNGs are in RGB mode, so SetPNG won't work with that.
Yes. That's why the -grab command exists in SetPNG.Grimm wrote:Setting offsets via SlumpEd messes up the alpha chunk? Doh!