Miss Nancy - the transmap plane technique can look good, but only from one angle. Plus, it is still a pain to try to cover a large area that way. Diolma - Yes you certainly could use the V coordinate to vary the parameters. In my image, that area is actually only about 30 feet wide, so I think it looks as it should. If I was covering a larger distance, I think it would fade naturally. Modus0 - both grasses are easily adjusted to produce long or short, uneven or even. In the hair room, adjust Hair Lenght and Length Variance. For the displacement based grass, changing the 4.5 to a larger number in the subtract node will make it wilder and longer.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)