Creating Corridor Surface

[teflon]

Calculating earthwork I am using subassemblies LinkMulti or generic or those without shape.

Then I try to make surfaces by extracting polylines from the corridor and make surfaces as I show in pic.

Topsurface is build of three toplinks and the bottomlink makes my bottom surfaces.

Making surfaces in "Corridor Properties" does not give me these surfaces.

What is the right way to make these surfaces?

[troma]

You cannot have vertical faces in a TIN surface. I imagine adding those vertical links is giving you trouble.