Thanks to Phil Spit40, it's now possible to cultivate the UK to a very high standard using Ordnance Survey (OS) data. Full instructions are available in the relevant thread. My attention has recently turned to other countries: is it possible to get the same quality of data elsewhere? One place that interests me is New Zealand. I've never been there myself but I know that it has a good variety of spectacular scenery.
After a bit of research I discovered that it is possible to download SHP files from the NZ equivalent of the OS. The link below is to the map CG10 (Invercargill, in the south). The download link is at the bottom.
The first thing I tried was the most recent version of Phil's instructions, whereby you simply load the SHP files directly into ScenProc. For the NZ data there is a folder "CG10" which seems to have similar contents to the folder called "data" in the case of the Ordnance Survey, so I used that folder in place of "data". Unfortunately it didn't work - ScenProc didn't read anything from the SHP files. (I did change the names of the files BTW. The NZ data uses filenames of the form "tree_pnt.shp" rather than "TQ_Woodland.shp" etc.)
The next thing I tried was Phil's previous method, whereby you open the SHP files in QGIS and save the "layer" as a KML file. When the SHP files are opened in QGIS the maps have a rather different appearance from that of the OS maps, which did make me wonder whether it would work. And indeed it didn't work - ScenProc read nothing from the KML files either.
So that's the stage I'm at. The whole thing looks tantalisingly similar to the UK Ordnance Survey situation - and I will defintely keep on trying. I'm far from being an expert or experienced at this sort of thing however, so I may well have made a silly mistake or it could be that I'm simply out of my depth. Anybody else who's interested in NZ might want to run with it and see if they can take it further!