there a generated face wrapper for physics similation it comes with sdk in the folder of sdk bin\win32 PhysXViewer.exe it comes with functions like iso surface and generate volume. it has ragdolls,hinges,softbodies,car effects, so
its basically the rest of physx simulation activated for runtime these files help the physx engine run somethlee to anticipate the ground level so physx dont fall thruogh terrain. and it set physx generated files in motion. thers an .object format there is also part of sdk to inergate model formats or level formats. i have several older editors if you would like to try.