Subject:   -30- 1.2 Bug Billboards with multiple pfGeoSets
Date: 8 Apr 1994 00:00:01 EST

  Using pfBillboards with more than one pfGeoSet sometimes causes a
  segmentation violation during the first cull traversal.  Workaround:
  use only a single pfGeoSet per pfBillboard at some cost in
  performance.