add_all_if_material( midentity, &world.foliage, mworld, mat_alphatest );
scene_copy_slice( &world.foliage, &world.sm_foliage_alphatest );
add_all_if_material( midentity, &world.foliage, mworld, mat_alphatest );
scene_copy_slice( &world.foliage, &world.sm_foliage_alphatest );