Thank you for the link !

Denis.

Bob Hughes wrote:
[...]
> I'll let Greg answer too  :-)  but you obviously haven't heard about MegaPov,
> or it's 'hf_height_at' keyword which allows you to find any points y
> coordinate on the surface of a height field.  HF is along x and z, not x and y
> as you had said and the y value is it's height.  Check at:
> http://www.nathan.kopp.com/patched.htm
> 
> Bob

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