optimizing 3d scene

[DANGH_b]

I have a 3d scene that contains 25000 polygons. I am using collission detection
for moving around, but it works to slow on a p4 1.5 ghz, 128 ram and riva tnt2
m64. On my computer works nice, but i have amd barton 3200+ 256 dd3 , gforce 3.
What can i do to optimise the scene? I know it has to many polygons. Can i do
something about it?

[hondo3000]

may be the problem is your collision detection, because it will only work
properly if you attach it to some models.

test your scene without the collision detection on your slow maschine and see
it is slow or not.

make the collision dynamically so that objects that dont need collision are
set to collision.enabled=false.

you can check the distance to the models and only if they are near to you
enable the collision.