> I have done something similar to this...I made a particle with mass and
> affected by gravity and used multiple calls to trace() to make the
> height field repel it. The particles kind of hover and bounce around the
> height field until they find a low area with no slope or go over the
> edge. To make the height field repel the particles, I simply used a
> bunch of trace() calls pointed from the particles current position in
> random directions.
> I might still have the source code somewhere...I could look for it and
> post it if you are interested.

I would definetely be interested...thanks

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