I am having a lot of trouble getting a nice hi-res field of grass that does not show a lot of apparent repetition.
I have gone from using 5 blades of grass, scattered with one FPP object and then that FPP is nested in another to create a larger field (as per your tutorial).
I am actually using two different nested FPP objects that have two different sets of Transform variables, just to create more variety. Then I made copies of the individual blades and made variations on them, so now I'm up to about 20 source blades, scattered into two 1mx1m FPP objects, and those in turn are scattered into a much larger (400-500m) area. Adding more blades has helped minimally - it just doesn't seem to create enough angle variations or something.
I am using mirroring and quite a bit of rotation at all levels of the FPP objects. See the result though: the split screen shows two renders of the same patch of grass with different lighting. As soon as the light gets more directional (on the right 1/2) you can see the repetition really jumping out. It kind of looks like a wind blowing from the right to left:
The source geo looks like this:
This is what the Transform looks like for one of the two nested FPP objects - the other is simiilar but with slightly different variables punched in. Mirroring is on for both FPP objects, as well as for the topmost FPP.
Two nested FPP's are using Scattered distribution, topmost is using Dense.
Any idea why it would look so repetitive?