Well that would be weired.. My initialisation of the mobilemesh is as follows: = new MobileMesh( this.RawVertices, this.RawIndices, new Physics.MathExtensions.AffineTransform(Vector3.Zero), Physics.CollisionShapes.MobileMeshSolidity.DoubleSided, 1f ); So the mass must be one. Also - would it be affe...