Hallo,
concerning the trees I wonder what results could have been achieved if Oleg's team joined their powers with another very experienced (with large landscapes) team most of you know - Bohemia Interactive. Their software known as Linda:
http://pro.bistudio.com/index.php/se...generator.html appropriately used and optimised for the purposes of flight simulation might have done intresting things. Speedtree looks too like from coloring book, but it is perhaps only my opinion and the final result is going to be excelent.
O.