Wheels Colliders yet again

Unity Engine
1

My wheels colliders fall through terrain, I searched in the forum but others solutions don’t work.
The scale is 1, the rotation is zero, I tried changing supesion but it keeps falling and most of the times in the same spot. Help please?

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2

I “”“think”“” I found an answer to myself, I’m trying to replicate the bug and I cannot, so until it appears again, this is what I did.

I have this empty

  • Map

  • Ground : Plane + Mesh collider Plane

  • Buildings : Mesh Collider

After testing, I got that after giving a mesh collider to Buildings, my car would get stuck.
I though that if wheel colliders need to have a Rigidbody in higher hierarchy maybe the buildings needed also a rigidbody in some point of their hierarchy.
I added a rigidbody to Map and the car does not fall… for now… I will keep testing and report if the bug appears again.

  • Map : Rigidbody

  • Ground : Plane + Mesh Collider Plane

  • Buildings : Mesh Colliders