Revit Topo - controlling contour lines

[Anonymous]

 I have a small residential project with corner lot sloping up diagonally from the intersection.
The client wants to raise 'usable' surface of the site by introducing terracing - 3 retaining walls 3' high and 3' apart.
All is interrupted by a driveway and series of steps leading to the main level.
I'm trying to modify existing surface, but the topo seems to have 'life of it's own'
I've tried to Split some surfaces to make life easier. That worked to some extent...
Any trick on how to make the topography cooperate?
Is there a way to 'turn off' triangulation? ( not the visibility )
I'm certain the contours I'm creating can be built, but Revit is 'changing' them to something else.
Some points that I place are simply ignored...
Revit's Help is no 'help', as there is no explanation of contour's behavior.
Is there a good source for this topic?

[Alfredo_Medina]

Can you post an image, please?

[Anonymous]

Here is 3D shot.

[Alfredo_Medina · Accepted solution]

Well, I would use Split surface combined with changes to the elevations of the points that define the split surface and the points of the adjacent areas.

[Anonymous]

Hi,

While I am Trying to form contours from lines using Plugin names Topo from lines.

I got error, Mentioned in Image.

[Anonymous]

Uninstall your plugin download it here and reinstall.. I've done that and it works now..

[Anonymous]

Lines must be Model lines and circles must be split into 2 segments. See if that works!