关闭mesh Renderer以便查看mesh Collider
"For Unity 5, we must also select "Convex" on the Mesh Collider, in order for the Mesh Collider to work correctly with the updated Physics Engine."
如果不勾选Convex,能运行,但console下会出错误提示:
“Non-convex MeshColliders with non-kinematic Rigidbodies are no longer supported in Unity 5.0.”
如果创建一个Quad仅用于显示,应将其mesh collider删除。