Paul Jones wrote:
> 
> Anybody have any ideas on how I could make a contour map of a height
> field?  I tried trace() and dropping a sphere at a point if it had a
> specific Y value, drop enough spheres and test for different heights and
> you statrt to get something which is OK, but it take half-past forever.
> Any other ideas? maybe a sphere sweep of some kind ??
> 

What about the water-level ?
(multiple instance of the height field, each with a different water level,
and a pigment/color map which would be Clear, except around the water level,
with a vertical Gradient)

Or even just a very detailled pigment/color map with a vertical Gradient
applied to just one heightfield.
Using an orthographic camera should also help (direction -y)

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