Hello.
I can create an obj or fbx file from within Terragen using the Micro Exporter, and successfully import it into a Maya scene (as shown by polycount and in the Outliner) but I cannot see it in the Viewport. It comes in only as a Shape node, with no transform node. I have tried extreme zooms in and out, and using F to frame the mesh but there is no sign of it. I tried exporting the mesh as an fbx and re-importing it, but although the Outliner shows it, I still can't see it in the Viewport. What am I doing wrong?
If you're using Maya and Terragen try my script - Terraman:
https://www.highend3d.com/maya/script/terraman-for-maya
demo and tutorial:
https://www.youtube.com/watch?v=ALbWYn_YHMI
Strange you are only getting a shape node - though I'd imagine one of the first things to try is setting your camera clipping planes - for a big terrain the default values are too small.
The script sets up camera planes automatically on import.