Cruising through the Autodesk App store for Revit and I came across this:
Topo from Lines
From Boost your BIM
Topo from Lines
From Boost your BIM
Create lines at various heights in the Revit model
Run the command
Select lines
A toposurface is created from points automatically computed on the selected lines
And best of all... it's free....
Check it out, its got a 4 star review!
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