Reply by ww_kayak

It looks like a fair amount work (depending n your experience), but the common theme is to convert KMZ files to whatever you need, however you can:
Sketchup to Bryce

Blender is also a free 3D program, but don’t even think about just trying to guess how to use it ;) If all you’re doing is opening and exporting, it shouldn’t be too bad.

-- Tom, Central New York