Hello,
> here is a possibility to get rid of the labels:
> \pstGeonode[PosAngle={0,-45},PointName={,}](.5,1){S}(-1.5,-1.2){A}(.
> 5,-.8){B}
> \pstHomO[HomCoef=.62, PosAngle=-45,PointName={,}]{S}{A,B}[C,D]
^^^^^^^^^^^^^
PointName=none is simpler !
and more comprehensive.
Dominique