for me it's the best beautiful cockpit I have seen and it's look as a 3D view , simply fantastic !!
also I like on the screen 168 ( bf110) how lighting take a realistic aspect to the wing ( not perfectly plane ) and to the cockpit with the subtle shadow on the nose plane
about lighting , reflections between objets will be implanted or not ? for exemple the sea reflect on the plane .
as you say the colors are not final for grass , tree , water , sky , but what about look or texture for tree ? because even with other color I d' ont like the trees ( and I d' ont see how it's look near them )
for exemple in this screen we have more details for trees :
http://www.imagup.com/pics/1256408654.html
as you say I hope that the nature will be fine as the spitfire cockpit in the futur , perhaps it 's the most difficult to render ( as human texture )