On 8/16/2015 1:06 PM, Nekar Xenos wrote:
> Maybe open the map in Photoshop. The largest areas should be the
> flattest areas, so they should be easy to select with the Magic Wand
> Tool. Once selected, Image adjustment/Gradient Map should do the trick
> if you edit the gradient to be only 24 shades of grey.
>
>

1. An image is not going to work because the result may have coordinates 
sharing the same XZ positions, but differing in Y. You can't do this 
with images.
2. I want a solution in code, not one where I have to do things by hand.

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