Here a another study scene.
I hope you enjoy it.
Any tips for improvements?
Very nice @acidwar , perhaps you may want to play around with placing actual tress in the scene though, the current background looks a bit “flat”, but it will be a preference thing as well. Maybe you can even try combining some Asset library trees with the existing background too. Also, I’d love to see a few more perspectives of the project, but if it’s designed in a way that it looks good from this angle, then I understand that too. Overall I still really like the rendering though! 
Amazing design you share
Thanks! It Will be very useful now on for the next jobs. I’ll be re-visiting this render and improve as you sugest in the future and posting here then