The second image looks much better.  At first glance, it is hard to say just
why, but I think it is because the blades show the right amount of curvature
versus width.  If you had longer grass, the curvature in the first picture would
look more realistic.  An individual blade of grass is fairly stiff, and does not
usually exhibit a great deal of bending unless exposed to high winds.

Cheers!

Chip Shults
My robotics, space and CGI web page - http://home.cfl.rr.com/aichip

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