I'm working on my first TA Spring map, and I have a question. I'm having trouble getting geo vents to work correctly. I'm positive that I've got a single pixel of green (255) in the metal map, but I see absolutely nothing in the game (no smoke), and it won't let me build a geo on that spot.
Anyway, screenshots are below. I'm fairly pleased with how it looks so far - I'm a really lousy artist, but it looks better than I expected.



Tools used:
GIMP
POV-Ray (for textures)
Custom C program for simulating erosion