It's been a really long time since I disgraced the Snakpit... but today I found my way back. And I felt I should share with you all something I've been working on for a couple years now:
Wall Worm.
I'm not sure how strong this community is in the realm of creating custom props, textures, skies, etc. But for those of you who do such activities, and use 3ds Max, Wall Worm is your new best friend (or old friend if you already know him :P ) You can even use it to export entire levels from Max.
Anyway, give it a spin! Or not. In either event, have fun mapping.
Shawn Olson
Developer of Wall Worm
http://dev.wallworm.com