- ClipWindingEpsilon( w, dp->planes[ i ], dp->planes[ i ][ 3 ], 0.0625f, &front, &back );
+ ClipWindingEpsilonStrict( w, dp->planes[ i ], dp->planes[ i ][ 3 ], 0.0625f, &front, &back ); /* strict, if identical plane we don't want to keep it */
+ ClipWindingEpsilonStrict( w, plane->normal, plane->dist, ON_EPSILON, &front, &back ); /* strict; if plane is "almost identical" to face, both ways to continue can be wrong, so we better not fog it */