+ /* Pre-emptively edit the camera matrices so that the motion vectors
+ * are correct */
+ m4x3f transport_i;
+ m4x4f transport_4;
+ m4x3_invert_affine( gate->transport, transport_i );
+ m4x3_expand( transport_i, transport_4 );
+ m4x4_mul( main_camera.mtx.pv, transport_4, main_camera.mtx.pv );
+ m4x4_mul( main_camera.mtx.v, transport_4, main_camera.mtx.v );
+