mesh collider issues

Questions & Answers
1

why are my mesh colliders going through objects with colliders on them. Box colliders work fine(just not defined enough)

Thanks

2

It should fix the issue, Mesh Colliders cannot collide with each other unless they are marked as Convex. Therefore, they are most useful for background objects like environment geometry.

http://docs.unity3d.com/Documentation/Components/class-MeshCollider.html