Falling through mesh

Hi,

I have a complex mesh, that came in, via 10 submeshes. I selected all of them, and chose mesh collider and I thought I was done

Im not sure if its my fault and the mesh needs to be optimized somehow, or if I found a bug, because as I go up the mesh on a path (mountain ), near the top I fall through completely and I see the terrain above me.

Is this a bug or something I need to fix in my mesh ?

Thx
jb

 

Any idea anyone ? This is a big deal for me, I can't believe no one had any idea of what might be going on.

later
jb

 

If you can you should use primitive collides an not mesh collider , for performance reasons.
If you need the mesh collider you will need to make one gamobject per additional meshCollider , since you can only have one mesh per Meshcollider.