using low poly mesh as mesh collider for low poly object

Unity Engine
1

i am trying to use mesh collider with highpoly mesh in the scene. i think it will
speed up things a bit. so i tried to make lower poly from the same object and then
to use it as a mesh collider. but no luck, does it need to be in the scene with renderer disabled in order to work?

duplicate here:http://answers.unity3d.com/questions/37533/using-lower-poly-colliders

2

Just use a different mesh in the mesh collider component.

–Eric