newmtl front
map_Kd forgedebugmodelloaderregistry:direction_test_front

newmtl back
map_Kd forgedebugmodelloaderregistry:direction_test_back

newmtl side
map_Kd forgedebugmodelloaderregistry:direction_test_arrow

newmtl top
map_Kd forgedebugmodelloaderregistry:direction_test_arrow_top