Certain Meshes not Rendering (Invisible)

[Yotingo]

Thanks for the suggestion! I was able to get it rendering correctly.

Now I'm trying to stabilize the simulation a little more.

In the example shown in this picture, the brush being held constantly jitters. 
The brush has a Mesh Collider, Rigidbody, Obi Rigidbody, and Obi Collider attached.
I played with the Obi Solver settings but couldn't get things to settle down.