multiple surfaces in window sidelights?

[bc]

See the attached shot of a door with sidelights.  Notice the frame and muntins are seemingly multi-surfaced as if there are two surfaces fighting for recognition by the OpenGL render mode.

How do I get rid of this?

Thanks

bc

 

edit:  I notice that if I turn off Include Muntins, they go away and I am left with just the sidelight frame. so apparently when muntins are applied VW also reapplies the frame and hence the conflict.  Why would the frame be re-added? You are specifying muntins.

 

Edited January 25, 2020 by bc