both fill hole and append to polygon should work! If they do not then you have some kind of funky non-manifold geometry or messed up shape node or something going on.
For append to polygon remember you should create the polygon counter-clock-wise.
For fill hole you select a single edge and then choose fill hole.
also from the screen shot you posted the hole you cut into the sphere does not appear to be planar. I am assuming you want to cut a flat planar surface into the sphere?
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram : 04-03-2010 at 01:52 PM.