vol->disp = GRITS_VOLUME_SURFACE;
GRITS_OBJECT(vol)->center = GRITS_OBJECT(level2)->center;
grits_viewer_add(GRITS_OBJECT(level2)->viewer,
vol->disp = GRITS_VOLUME_SURFACE;
GRITS_OBJECT(vol)->center = GRITS_OBJECT(level2)->center;
grits_viewer_add(GRITS_OBJECT(level2)->viewer,