"David Nedrow" <lis### [at] nedronnet> wrote in message
news:40e1a072$1@news.povray.org...
>
> What I'd like to do, is have the image mapped on a plane or box, with
> the front surface (camera facing) normally opaque and reflective. Behind
> the object, I'd like to use a soft light to illuminate the object from
> behind.

It could be that all you need is 'ambient' in the finish statement of the
image mapped object; using a value above zero, and perhaps below one so that
it still is affected by any light source(s) external to the room. With
diffuse being adjusted also, for how you want it to appear in light.

If the idea is to illuminate other objects, not only the image, then you
will need to use either the 'radiosity' or 'light_group' features. Light
groups have a lot of control over what gets lit and what doesn't. Radiosity
would be less controllable, and depend on diffuseness of the image maps
brighter parts.

That of any help?

I'm guessing you were not asking about invisible, yet interactive, objects.
That would require a 'no_image' in the object (camera doesn't see it even
though it reflects in other objects).

-- 
Bob H.
http://www.3digitaleyes.com

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