Collision Mesh Generator automatically turns complex meshes into a set of convex hulls that are suitable for realtime collision detection and raycasts, even on mobile devices. Unity only supports mesh to mesh collisions if at least one mesh is convex, so this is a required step even for high end platforms.
The whole process is customizable including generation of collider components, mesh renderers, asset saving for prefab reuse and editing in external 3D modeling software. Full control over the decomposition settings are exposed in the advanced panel.
Compatibility: Supports 64-bit Windows Unity editors. MacOS and Linux support coming soon.