How do I get unity to draw the green wireframe for concave colliders?
I’m not sure of the proper way, but I’ve noticed if the mesh of the Mesh Collider is not the same one as the Mesh Filter it will draw the green wireframe. So if you absolutely had to see it now (vs. waiting for a response with the actual way… assuming there is one), as a quick/temporary way to see it, I think you could just duplicate the mesh asset and assign the duplicate to the collider. Another quick way to have it in the scene with the wireframe would be to duplicate the object, right-click the Mesh Collider mesh property and Copy, paste it into Mesh Filter mesh …then (assuming you have a Mesh Renderer component added) it would draw your collider mesh like a normal one (so… you could then just switch view to Wireframe or Shaded Wireframe in the bar at the top of the Scene window).