In article <387624A9.770C0A88@ida.utb.hb.se>, Mikael Carneholm 
<sa9### [at] idautbhbse> wrote:

> I've thought of this, too. Should fit in the background statement, if
> background could take a pigment statement, like this:
> 
> background{
>   pigment{
>     image_map{
>       ..
>     }
>   }
> }

That isn't possible with the background statement, because rays aren't  
always shot from the camera. Where on the image_map or pigment would you 
sample for a refracted or reflected ray?

The sky_sphere feature is basically this feature(a pigment for the 
background) with that problem solved by using the direction of the ray 
to sample the pigment as if a sphere with that pigment surrounded the 
origin of that ray. At least, that is how I understand it.

Having an image follow the camera might be useful, but it shouldn't be 
mixed up with the background statement. And it might be better solved 
with a macro. I think there are already macros that do this.

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

Post a reply to this message