Hi danperk,

> Is it possible to isolate the red lines into a separate layer when exported?

Those are the "seam edges" on closed smooth surfaces - I think that these particular kinds of edges just won't be exported at all, unless they are also a silhouette edge.

I haven't got any of the edge filtering out stuff in place yet.

Do you ever see a need where you would actually want those particular edges in the drawing?

- Michael