Creating a planar surface from a 2d curve results in strange unfilled geometry

 From:  bemfarmer
10842.2 In reply to 10842.1 
Hi quat,
I think that it is a display artifact, due to display speed compromises.

Try Options > View > Mesh angle , lower value, say 2, or 5, ..
See Michael's response.

- Brian
(Post a .3dm please)