I may have posted something like this before, but this is better. It does what the title says, it does it with planes. It isn't completely perfect, one tiny glitch (sticking on obtuse corners). I get 150-160 fps while colliding, if it is slower then increase the turning and speed variables. Here it is (DBC, DBPro not tried, but it could be adjusted easily)...

Nice. This would be usefull for levels too with hidden plains, but would be a pain to have to put them all there. Useful feature for a level editor though .

P.S.
It works in Pro, except it gives me trouble with "Center Text" for some reason. Just change it to "Text"; it really dosen't matter.

Yeah, if you had big levels then generally you would have a level editor. The sticking on corners (which you may have noticed) could be solved easily by having collision only working on one side of the plane, which would be sensible since most objects are thicker that 1 plane, they would require 1 plane on each side.

Hmmm I get a "command out of place" error at line 127 using DBPro....

That's "Center Text" Change it to "Text" and it should work fine.

Nope, command out of place still

very good

works great in classic but i get a command out of place error at line 125 although it highlights 127?