Because I really hate my drawings of Katou(when I want to draw in the original style) and because I want to try out some colors and techniques in Photoshop, I picked some pages of the manga and colored them.
Here are the original drawings(done by Hiroya Oku and his team):
Another one! Because it's a spoiler pic, I made it smaller(will be bigger when you click on it). So if there are Gantz readers here and not in this chapter now, don't look! Unless you really want to see it!;) I tried to make a fake screen-shot!LOL