Hi Rob, The terrain was modeled in Turbocad and the house in Sketchup.
Sketchup is a very good program for architecture but not so good in tracing situation drawings.
It is able under some strict circumstances to convert a DWG into a Skp file with outlines and faces, but as a lot of situation drawings arrive as an abundance of single lines in stead of closed polylines, they are useless.
The reason I use Sketchup for modeling is that I apply materoals directly in Sketchup, like I used to do in Turbocad, but as I use Vue for landscaping and renderingm, the SKP files keep their materials with import.
And that is is a great time saver.
The ease of modeling in Turbocad and Sketchup is similar. Sometimes I model some parts of a house in TC because it has a smarter solution for that action..
I love both programs.