Vehicle falls through displacement surfaces

[YamahaAlex37]

Is it possible to drive a vehicle over displaced surfaces? I create a simple map with some hills but the vehicle falls through the displaced surface. I am using the entity prop_vehicle with the buggy.mdl. Am I doing something wrong?

 

[Unarmed]

Displacements seem to be broken with the last SDK update (something is always broken these days).. Cant answer until displacements are fixed.

 

[63]

I'm having problems with displacements too. Does anybody know if Valve actually tests sdk updates?