Fabien Mosen wrote:

> Wouldn't it be logical to use it as an image type in image_map ?
>
> object {
>        Stuff
>        pigment {
>                image_map {
>                          portal {
>                                 camera {...}
>                                 }
>                          map_type ...
>                          once                 }}}
>

This is a really cool feature you've developed, Chris. But perhaps it's
a limitation of my understanding in that I cannot grasp its use beyond
type of application proposed by Fabien.  While I'd love to do anims
where say there are TV monitors showing 2-3 extra views of the same
action,  I still don't comprehend the concept of "portal object."

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