Aerofly FS2 has an autogen feature called 'cultivation'. I've posted some info on this before, including Christchurch/Canterbury screenshots, but now I'm trying to work out what the limitations are. It isn't as easy as FSX autogen, as there's no 'annotator', so you can either hand-place buildings and trees, which would take eons, or use something which automates the process from data files. These shots show a test run of the LINZ vegetation areas ('native' and 'exotic'), plus windbreaks, and all the building footprints available. So we are talking about millions of objects, all crammed into one 'cultivation' file. This is basically a text file, but it is far too big to edit in anything.
Missing are individual trees, the sort of thing I'd hand-place in FSX. Not sure how to add these, but I do have a few ideas. Only two types of trees available, that would need to be overcome.

