Vertex editing is also an easy way to bugger up a CSG level :lol:

It's true though, with skill, it's possible to make stunning levels. I always end up breaking mine whenever I mess with the vertexes though. I do wish that some of the tools would allow better control of the geometry... perhaps it was a torque thing but it was always a hit&miss affair for me trying to make organic looking shapes. sometimes things would look different after compliation than they did in the editor.

In my experience, CSG is great for boxy rooms, but as soon as you want something smooth or intricate, then the skill/results graph starts to go a bit turbo.

UT2004 has some truly amazing looking levels.. I think they use something else, there appears to be a lot of repeated, hi-res models used in the environments. Perhaps they've taken the bsp tree model and applied it to fixed entity positions.