Well, I am interested in modelling wind patterns over a reed field, or a 
corn field. What I seem to observe are turbulent wave patterns moving 
the stalks back and forward while going over the field.

This is a first approximation. I am not really satisfied yet with the 
pattern. What I did is:

1) Make an image_map with a more or less turbulent ripple pattern.
2) Make a height_field based on that image_map.
3) Build a reed stalk with Inverse Kinematic properties (macro with Bend 
parameter).
4) Select random locations on the height_field;
4a) calculate the vertical angle between the normal at that location and 
a horizontal plane (using: VAngleD(V1,V2));
4b) calculate the horizontal angle between (arbitrarily) the +z-axis 
direction (direction of primary bending of the reed stalks) and the 
normal of the random location point (using: VRotationD(V1,V2,axis)).
5a) bend the stalk with a proportion of the vertical angle (4a);
5b) orient the bended stalk by rotating through the horizontal angle (4b);
5c) place the reed stalks at the random locations on a flat surface.

The image shows 15000 reed stalks. About 4.5 minutes render time.

suggestions are more than welcome of course.

Thomas

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