Collisions with complex terrain?

[orosbogdan]

What would be the best to use for collisions with a complex bumpy terrain if I want to drop lots of cube on it ?

[RossNordby]

Mesh would be a good default. A custom collidable specialized for a specific terrain-ish use case is also doable, but annoying enough that I'd definitely default to Mesh until you have very specific reasons to do otherwise.