Triangles between lines

As @prisoner849 noted, Line3 is only a mathematical tool and does not create a visible form.

Your pictures look like the high lines of a terrain.

If you have certain measuring points for this, you have the lines, of course.

To get the terrain as a surface with the lines on it, you have to create a self-defined geometry. Then additionally the lines.


To
“Need to fill of between lines when growing up or down sequenc of lines.”

That means, you have to realize a triangulation of an arbitrary outlined surface in 3D space. This is not trivial.

I have done something like this for implicit surfaces and some forms with holes.

Addon for triangulation of implicit surfaces/ forms with holes

This works if you have the gradients to each point.

In your case, it should be possible to determine them approximately from the measuring points - I think - or?

You can see how to draw lines in addition by looking at other examples, e.g.
THREEf geometries r136

2022-02-11 20.52.26

(see Addon. Produces almost infinite many time-varying geometries with functions)

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