This is a lovely image:) Is so nice to see the new and exciting things we can do with TG
Can I make some comments from the point of view of a gardner?
Your lily plant model is very cute. And I know you are still tweaking it. However it looks like you have imported one copy of it and then just replicated that all over the slope?
It would look far more natural if you had several different ones that were all different - especially the orientation of each plant from itself.
I am still new to TG2 and I have no idea how to import these kind of objects and deploy them, but for a more natural look I would make several different individual plants (spinning some around, tilting off 90 deg upright, colouring the leaves, changing the size etc) and then bring those together to make a clump and then replicate that all over the place. Will give a more natural look.
Also it should have more undergrowth between the plants, grass or weeds or something as well, these kind of plants are seasonal and will grow up thru whatever is usually there, flower madly and gloriously (as you have captured) and then die off.
Anyway, I aspire to have the skills to make an image half as nice one day!