bemfarmer
>> Does this perform similarly to zsurf4?
I don't know. I never used it. :)

Mindset
>>.. might it possible to analyze a surface and produce a height map
Yes, it's possible. We can use PGM as output format. You can open it with photoshop.
Maybe later I'll write such a script.

Michael
Thanks for advice with delimiter

Frenchy Pilou
>>Does it possible to have density of curves
Right now it's not possible. But you can resize an image. If you want to get 60 curves, resize image to 60x60 pixels.

ed
Interesting work. Try to use the new version. It can produce much more detailed surface.