Get spatch, it is a Spline patch modeller, and can output to pov bicubic
patch objects, I can't remember the url right now thought, perhaps GrimDude
will help? He know everything ;-)

-- 
Tristan Wibberley

(Remove the '.NO_LUNCHEON_MEAT' from my
email address to reply.)

Roland Mas <bob### [at] clodomirrezelenstfr> wrote in article
<6aknoh$m32$4@melchior.Cuivre.FR.EU.ORG>...
| Mark Mealman and Saif Ansari discussed about a ribbon.
| > Using ripples?
| 
| Nope. Ripples just change the normal of the surface, and do not move the
| surface itself.
| 
| > Or maybe a very smooth heightfield?
| 
| That could work. You can even use POV-Ray to generate your height field
| image: put a plane in front of the camera, and give it a texture like:
| texture {
|   finish {
|     ambient 1
|     diffuse 0
|   }
|   pigment {
|     gradient y
|     colour_map { ... }
|   }
| }
| 
| With the colour map adequately defined, that produces good output.
| 
| Other possibility: you could use a bicubic patch. A little bit harder to
| control, but it gives splendid results. I once used them, but I cannot
| remember the precise syntax. Anyway, the docs are quite clear on this
point.
| 
| Happy tracing,
|   B-o-b
| --

| bob### [at] casimirrezelenstfr -- Linux, POV-Ray, LaTeX
|

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