500M...! I usually stuck about 30-60M and then my patience ends... Anyway, I'm sure, careful prepared pictures (masks etc) can be really amazing. Btw, Emkay, yes, I know G2F, but that program requires fairy amount knowledge of Atari inner work (and has a "lower" detail resolution overall, because of characters use, if I understand correctly how it works, but please, don't cite me...). Rasta is wonderful easy to use. Anyway, some of pictures, reminds me a bit Amiga HAM mode (those stripes (sprites?) artifact...).
zebcorpse_castle.xex
zebcorpse_dude.xex