==============================================
  vertex_attributes = PEXGANone;
==============================================

==============================================
  vertex_attributes = PEXGAColor;
==============================================

==============================================
  vertex_attributes = PEXGANormal;
PEXError: Bad PEX OC
OC code: 87
Request code: 43
==============================================

==============================================
  vertex_attributes = PEXGAEdges;
PEXError: Bad PEX OC
OC code: 87
Request code: 43
==============================================

==============================================
  vertex_attributes = PEXGAColor | PEXGANormal;
PEXError: Bad PEX OC
OC code: 87
Request code: 43
==============================================

==============================================
  vertex_attributes = PEXGAColor | PEXGAEdges;
PEXError: Bad PEX OC
OC code: 87
Request code: 43
==============================================

==============================================
  vertex_attributes = PEXGANormal | PEXGAEdges;
PEXError: Bad PEX OC
OC code: 87
Request code: 43
==============================================

==============================================
  vertex_attributes = PEXGAColor | PEXGANormal | PEXGAEdges;
PEXError: Bad PEX OC
OC code: 87
Request code: 43
==============================================