Problem with terrain + collision (meshes)

Hi

For Terraed Pro i have the same problem... But i have try
to hunt this bug to know where is the problem.

IMO this bug is an entity number bug. When you have many patch
on the terrain, blitz collision become crazy and the camera
pass through the ground ...

I have try many stuff to remove this problem, but without
solution. Remember ! Blitz hait big entity number.