+" vec3 world_pos0 = uMdl * vec4( a_co, 1.0 );\n"
+" vec4 vproj0 = uPv * vec4( world_pos0, 1.0 );\n"
+" vec4 vproj1 = uPvmPrev * vec4( a_co, 1.0 );\n"
+"\n"
+" vs_motion_out( vproj0, vproj1 );\n"
+"\n"
+" gl_Position = vproj0;\n"
+" aWorldCo = world_pos0;\n"