extrude subregion revit

[mir]

Hi.
I have a subregion on a topographic surfaceNow I would like to create a volume according to this subregion.

I can't find anything online.

In fact, I have to simulate volume increases.
Thank you.
♪

 

[Tristan]

No, I don't. subregions are always and only surfaces. revit unfortunately is not a software suitable to work on land

 

[mir]

I did a monstrous work between revit + inventor + cad