Terragen scene

I'm trying again with Terragen 2 - I know that version 3 is out so getting my head around the version 2 features is taking a little time...I used the tutorial from here and then fiddled with it a little to get this:

I'm not sure I'm convinced by the foreground but otherwise I'm showing signs of improvement! I ran this on my Vista installation, running on my kubuntu desktop (using Wine to run the windows .exe) is rather slower I don't know whether that is due to the 'emulation' being slower in this case or whether I'm just using the desktop for more things at the same time!