QUOTE(mtpeak2 @ Apr 22 2009, 06:31 PM)

That's cool Stian.
How are the wheels on the cart turning? Is that from newton? Or do you have them rigged somehow?
The problem with "wheels" in Newton is the resolution of the "collision hulls" that are created by the plugin. They aren't "completely smooth" even on the highest setting. There will always be faceted bumps (the wheels on my newton car would get "stuck". The car would still move but the wheels would turn sporadically). The more dense your mesh the smoother the surface. The other problem is that Newton creates collision hulls based on the "shortest distance" between the outer dimensions of a mesh. If you have a curved arch that has no Newton groups with the resolution set to 16 the outer curve will be very smooth, but the inner part won't even "exist". It will "close off". It would be closed off completely unless you break it up into newton groups, but each newton group would also close inner curved surfaces based on the closest protruding parts of each group... so you need lots of newton groups to create a smooth curve on "inside" curved meshes. The only way to smooth the inside of curved meshes is to have lots and lots of Newton groups. Mesh density has no effect on inner curved shapes.
Default collision hull resolution 4. No Newton groups:
Click to view attachmentSorry for protruding, please continue.

-vern