bumpy non-collideable surfaces behave weirdly

[alex25]

i've just noticed that if you have a non-collideable surface which has bumpiness and friction coefficients assigned to it, then the car goes absolutely crazy once you drive on it (through it maybe). as a sanity check, it would probably be a good idea to ignore any such coefficients if the collideable flag is set to zero.

i saw this at imola where i assigned a bumpiness coefficients to a blend surface between the track and the grass, but the blend surface itself was non-collideable since it was sitting on top of collideable surfaces. driving on top of the blend surface made the car bounce around violently until i made the blend surface collideable and then the bouncing stopped.

hope this helps.

--alex--