Mesh Collider colliding with Primitives is jittery

When the two collide the collision doesn’t feel smooth (even when I add physics materials).
If I use both mesh colliders or both primitives against each other it collides smoothly.

The other object is a cylinder shape and I want to use a mesh collider for that to get accurate collisions.

Any ideas on how to remove the jitter?

Typically the way physics works in games is that when you move an object and hit another, the object actually enters the physical space of the second, so what the engine does is recognize that this isn’t suppose to happen and move the first object out of the second.

There’s a few ways to get around the jittery look but they all depend on what you’re trying to do. So for example if you’re having an elevator type interaction then you need to actually move both objects, not just the one.