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On Thu, 03 Aug 2000 13:35:30 -0700, ryan constantine wrote:
>in example one it seems to me that light from the outer edges of the
>area light should get farther underneath the point light than in example
>two. example two should light less than one hemisphere and example one
>should light way more than a hemisphere. in my opinion, if this isn't
>how it works, it's wrong and should be fixed.
That's not how it works. That's even not how it's documented to work:
| The area_light keyword in POV-Ray creates sources that are rectangular
| in shape, sort of like a flat panel light. Rather than performing the
| complex calculations that would be required to model a true area light,
| it is approximated as an array of point light sources spread out over
| the area occupied by the light. The array-effect applies to shadows only.
| The object's illumination is still that of a point source. The intensity
| of each individual point light in the array is dimmed so that the total
| amount of light emitted by the light is equal to the light color specified
| in the declaration.
If you want "real" area lights, use an array of point lights. Be aware that
that will make your render time a lot slower; so would "fixing" the current
implementation.
--
Ron Parker http://www2.fwi.com/~parkerr/traces.html
My opinions. Mine. Not anyone else's.
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