Inthispaper,weshowanextensionofthemodelproposedbySabourdy,combiningvariousimplicitsurfaceswithsoftblendingcapacitiesinaCSGtree.Thisextensionallowsintegrationofplanesurfaces,skeletonsandmanyothertypesofimplicitsurfaces.Itparticularlydevelopstheblendingpossibilitiesofferedbythisapproach