       SippReset
              This Tcl procedure completely resets the SIPP envi-
              ronment.  All objects,  surfaces,  shaders,  lights
              and  cameras  are  released.   The STDCAMERA, back-
              ground and line color, and the show backfaces  flag
              are  all  reset.  All allocate Tcl-SIPP handles are
              no longer valid.
