Shading and rendering puzzle

 From:  JPBWEB
2540.1 
Hi all.

A part of the model I am working on in MoI stopped being « seen » in Rhino both in shading and in the renderer. The puzzling bit is that only a portion of the model “disappeared” and is displayed only in wireframe, while the rest of it looks fine. In MoI, the entire model still looks normal. Everything is joined into one single part. I wonder what happened and what I should do to get it back to normal.

Jean-Paul

This is how it looks in MoI

And in Rhino

And in Flamingo