Sometimes you need to separate the effect you want to achieve with CGI from how
you might actually do it in the real world.

Perhaps you can just add finish {emission 1} to your image_map instead of trying
to actually backlight it.

Then there's http://www.povray.org/documentation/view/3.6.1/316/

and you may want to look at the double_illuminate modifier

Post a reply to this message