I am working on a realistic space game and I need hyper-realistic physics. I understand what the error 'Non-convex MeshCollider with non-kinematic Rigidbody is no longer supported since Unity 5' means, but I can't give up neither. Convex collider makes my complex spaceship collider into an oversized triangle, making the physics behave wierd. I also need a rigibody not to be kinematic, as I need the ship to collide properly. Is there any other solution other than: A) Recoding the physics engine B) Creating a custom collider with primitive collider shapes ?