3D solids following surface height

[met1ns]

Hello!
Is there a way to give a rule to 3d solids so its 1 meter under my surface at all time?

If not, can I do it to 3d polylines? Feature lines? Then convert it to 3d solids.

Thank you!

[tcorey]

You can do that with Feature Lines and their elevations will remain dynamically linked to the surface, at any +/- value you give it.

[met1ns]

Thank you!

So now I do have feature lines at correct height.
But here is the issue.

I want to sweep it to 3d solids. But I cant sweep feature line. I tried exploding it to 3d polyline and sweep it, same result... Any iddea what I can do?
The end goal is to get 3d solids at correct height and shape.

[met1ns]

I managed to find the solution to that problem. I had to uncheck "Insert intermediate grade break points." Now Im able to sweep my 3d polylines that I have exploded from the feature lines.

When I draw the size of the rectangle that I wanna sweep the 3d polyline from, which point of the rectangle gets it sweeped from? Top, midd or bottom point? So I get the correct height.

Thank you.