You could use one of the text positioning macros that I have seen
posted here. Just use the same math to place a plane or sphere segment
in the camera direction of view (camera normal?) and then put your image
on that. Everywhere you look, the image would be sure to follow.

Nieminen Juha wrote:
> 
> mr.art <mr.### [at] gcinet> wrote:
> : sky_sphere takes a pigment. A pigment can use an image map. And an
> : image_map can use map_type 1.
> : sky_sphere { pigment { image_map {png "I:\Images\earth.png " map_type
> : 1}}}
> 
>   It's not the same thing.
>   My idea was that if the ray shot from the first pixel doesn't hit
> anything, then the first pixel of the image is taken, and so on. This
> regardless of the position of the camera.
> 
> --
> main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
> ):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

-- 
Mr. Art

"Often the appearance of reality is more important 
than the reality of the appearance."
Bill DeWitt 2000

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