I'm bored and I want to try making a pk3 that's halved of asset quality (sound and textures) for size, compatibility/performance with lower end systems and mapping tool scale reasons. I'm using imagemagick in Windows (too lazy to boot into linux atm)
For some reason trying this in the models/players/gargoyle folder:
mogrify -channel RGBA -adaptive-resize 50% *.*
Seems to lack alpha channels on the wings now

Also I can't figure how to batch resample .wavs in half with sox :S