surface display error?? created by BRepOffsetAPI_ThruSections

i have a surface created by BRepOffsetAPI_ThruSections.

one side looks ok with it's color but the other side looks nothing..
what's the problem?

please see attached file.

thanks,
humkyung

Attachments: 
zbaekhk's picture

sorry, it was my mistake.

it's ok when i set isSolid=false at calling BRepOffsetAPI_ThruSections.