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Subject:   -24- Coplanar Polygons & pfDecal on certain platforms
Date: 8 Apr 1994 00:00:01 EST

  pfDecal works only on machines that support the stencil or
  displacepolygon command.  The default decaling mode for PFDECAL_BASE
  now uses displacepolygon instead of stencil.  This can significantly
  improve rendering performance but can result in visual anomalies
  where layer polygons incorrectly "poke" through other geometry.  If
  you wish the old behavior then specify the PFDECAL_BASE_HIGH_QUALITY
  token.

Up: SGI performer Frequently Asked Questions (FAQ)
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