Some graphics are missing if return true from _ProduceGPAs() always.

All,

I am trying to process the extended elements and get the geometry details. Are there any specific steps to follow while returning true or false from   _ProduceGPAs(bool isCurved), _ProduceFacets(bool isIndexedPoly)  and _ProduceBodies(bool isCurved, int kernelType) or it is upto the developer. If I hardcode the return value of _ProduceGPAs to true, some graphics are missing in my application's display. Please help me on this.

Regards,

Pasu