custom sliding collision

Hiya

Is there an example of how to do sliding collisions however with these parameters:

* min slide angle it will begin sliding at
* max sliding angle it can climb at

its sphere to mesh sliding collisions but I can't figure out how to adjust the amount of sliding it does. I have a hilly landscape and dont want the sliding down to occur unless the angle is steep enough...

Can't you use stop-collision first, then switch to sliding collisions if the collision normals are beyond a set tolerance?

Not done any 3D for years but off the top of my head, I'd be looking at something like that.

it works but its really stiff and bland. Any custom solutions out there?