Physic multiple fail (help!!)

Unity Engine
1

Hi everyone.

The scene:

  1. I have a ball (rigid body + sphere collider) falling on some “switches”.
  2. The switches are complicated shapes made in Cinema4D and imported as .fbx models. I am attaching an image of one of the switches.
  3. From my assets, when I move a switch into the scene, by selecting “Generate Colliders”, the ball correctly collides with the shape of the switch. All good.
  4. I do need the switch to rotate on his Joint (where the hole in the switch itself is) but now, if I add this fix joint to my switch, the ball will pass trough the switch. Rigidbody does not apply no longer. And not even the colliders.

Any hint?

2890286--212494--Screen Shot 2016-12-18 at 20.44.39.png

2

P.S. the effect I want to emulate is EXACTLY this one from this old game, when the ball falls down: