Thank you for precisions. If I understand Kray instancing system correctly, the placement of "proxy" had to be made in modeler, and from that, I think there is many options or plugins in order to place proxy in modeler in a easy and natural way.
So for now, I think the main points to have realistic grass is to have good and many (maybe 10 as you said) patch of grass/vegetation, and to place them correctly (meaning according to reality) in modeler. Are you waiting to be able to place instances from weight map or texture map?
Anyway nice work on that picture too, ground and shader are impressive!
