PK_render_region_t    


typedef int PK_render_region_t;


This field can take any one of the following values.
    PK_render_region_no_c       : don't output regional data (default)
    PK_render_region_attrib_c   : output regional data for silhouettes and
                                    edges bounding faces with the regional
                                    attribute
    PK_render_region_yes_c      : output regional data for all edges and
                                    silhouettes