"David Wallace" <dar### [at] earthlinknet> wrote in message
news:3BC747EA.81E07357@earthlink.net...
> I can transfer an image_map to a radial pigment using pigment_map:
>
[snip]

I received this in my mail before reading it here. But for everyone's sake:

It seems I was unintentionally misleading; radial didn't work like I remembered.
Probably, because I don't really recall using it with image_maps before,
however, I think it could if done with pigment functions.

Everything I said about spherical warps is correct though. With a little bit of
trial and error I came up with the code below. The image_map I used for the sky
came from Jeremy Engleman's website (as recommended by Gilles Tran).

http://art.net/~jeremy/photo/public_texture/index.html

They are sufficiently huge to avoid stretching. I cropped the ground out of the
bottom before saving as .bmp and naming it something more meaningful to me.

If you remove the water plane, change the initial x scaling of the pigment, or
its y rotation on the sky_sphere, (and had the bitmap) you would see where the
tiling occurs since I didn't bother to process the image for seamless tiling.

<code>
#version 3.5;
#include "colors.inc"
camera { location < -329,121.5 , 41.7> look_at < -600, 82.0 ,  0.0>
        angle 60}

#declare Sky1 = pigment { image_map { sys "PinkSunset.bmp" interpolate 2 }
     scale <1/5,0.25,1>
       }

#declare Sky2 = pigment { color SkyBlue}

sky_sphere {
      pigment {  Sky1
          warp{
               spherical
                    orientation z
                    dist_exp 1
          }
      rotate y* -8
      }
}/**/

plane {y, 0
     texture {
          pigment{color rgb<-1,-1,-1> }
          normal {wrinkles 0.1 scale 100}
          finish {
               ambient 0.1
               diffuse 0.6
               brilliance 1.0
               reflection { 1.0 }
          }

     }
}
</code>

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