There are a couple of problems I can’t easily fix with those solutions. First, the edge of the disc is rounded, and I need it to be rounded. A cylinder could work, but would give me some odd lifting from the ground when the disc tilts, and it would need to be very smooth. This is one of the main components of the scene, and will be used almost constantly. I need it to roll smoothly, like a disc would. Any oddities in its motion, like rocking back and forth between two edges when it comes to a stop, or like lifting slightly and falling back down will be immediately noticeable and jarring. Sphere and Capsule collisions are the only things I’ve found so far that roll smoothly. Unfortunately, since the disc is thinner than its circumference, a capsule is no different than a sphere for my purposes. If it was a long shape with a small diameter, I could use a sphere or capsule and the end blocks. Even if it was tapered, I could use multiple spheres. But those options don’t work for this.