Very helpful OP above, confirming that TM accepts .xyz files to create topography. But can I make it work? Import the .xyz and precisely nothing happens - no addition to the list of imports next to the +, nothing in file>open, nothing added in the scene. What am I missing?
The OP says the .xyz must be space-delineated, and elsewhere I read that a .txt can be simply re-named to .xyz.