"Slashdolt" <nomail@nomail> wrote in message
news:web.3e247766552627465543301f0@news.povray.org...
> >Well, I'm getting there. HDRI is a way of approximating real-life
situations
> >that Pov-Ray can't do, or can't do well -- I'm thinking events like depth
of
> >focus, glare, sun flares.
> >
>
> Not quite.  It really has to do with one thing only, afaik.  Simply the
> lighting.
>
> By allowing some things to be brighter than simply "all-white" it allows
you
> to insert a 3D object into a "real life" photo, and have the same lighting
> in the room as you did when the photo was taken.  To use my "sun coming
> thru a window" analogy, your 3D object could actually be "lighted" from
> where the sun hits on the far side of the room indirectly, and not just
> from the actual light source.
>
> I still don't feel I'm explaining this very well.

No, actually that about did it. I'm rendering a statue in a white room.
There is one light source illuminating the side of the statue the camera is
looking at, meaning the other side is dark. HDRI bounces the light off the
white walls and illuminates (partially) the other side if the statue. Do I
have it now? That's pretty cool.

Mark

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