Something that's been bugging me for years is that I've seen a tutorial on how to make a diorama of a gas swamp (you know, with those bubbles coming up and splashing open), but have never been able to relocate the site. I was wondering if you had any hints on how to tackle making a 'toxic' swamp like that, Ron. I was thinking about making a rough styrofoam base with half styrofoam balls glued on top. Cover that in a layer of smooth plaster and paint it up.