Mesh Colliders - what is most efficient?

Questions & Answers
1

Suppose I have a large model with a lot of polygons. What would be more efficient:

  1. Create 1 large MeshCollider object with lots of polygons
  2. Break up the model into, say, 10 smaller chunks, each with a MeshCollider

My instinct says that (2) should be more efficient, but I don't know since MeshCollider is a black box to me. Does MeshCollider have an early AABB rejection? What is its algorithmic complexity?

Any extra information on the performance aspects of Mesh Collider would be much appreciated.

2
  1. should be preferable due to lower overhead. PhysX will construct one big AABB tree for all static meshes in the scene.