here, I build a grass-walker.

Load figure and set IK to OFF
Zero figure in joint parameters.

I loaded 2 balls from the primitives.
Scaled them in Y to make an egg shape.
Position each egged ball exactly over the left and right shins.

Select one at the time, and parent to the figures left and right shin, with inherit bends checked on.

Use this into your grass simulation and let the grass collide with both balls.
The grass will bend out of the way when the figure comes through.

I will try a sim tonight. (time-time-time- )

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!