add back helpers for directional and hemisphere lights
add back helpers for directional and hemisphere lights

vizorvr/vizor-create,vizorvr/vizor,vizorvr/vizor,vizorvr/patches,vizorvr/vizor-create,vizorvr/vizor,vizorvr/patches,vizorvr/patches,vizorvr/vizor-create,vizorvr/patches,vizorvr/patches