Cinema 4D collision test
I made the skulls to drop onto floor with dynamics and
the dynamics setup has got another object as a collider for the skull because it´s just
too highres to be calculated as a collision object. The polygon amount is almost 750 thousand
(749998) polygons in skull object.
Basically you need to make only a rough boundary polygon shape for the skull model in order to get a decent
collision for dynamics simulation. Perhaps you need to have to scale the project size into 10 because the skull
model is very tiny.
Here´s the collision shape
Skull highres polygon amount