Thank you for your answer,
i´ve not scaled the tarrain in WED. It is imported in original size.
I try to registred the terrain, with this action:

Code:
action actTerrain() 
{
	pXent_settype (my, PH_STATIC, PH_POLY);
	wait(1);
}


But the car still falls through the floor.

A8-Com-v 8.47.1