There might be one more effect in the picture, but the ones you discussed in
this thread, that would cause the line to be blurred: if the wall is
bumped, the bumps in the wall may reflect light, causing the neighboring
bumps to be lit, even that they are not directly lit by the sun. Radiosity
or photon maps might be used for this.

"ZainAnak" <nomail@nomail> wrote:

> I had an idea, though.  If you look at the original picture I posted as a
> reference, you'll notice that it's a pretty small, well-defined bleed that
> occurs at the sun line.  I was wondering- couldn't I achieve this with some
> sort of area light setup?  All I really want, after all, is the sun lines
> to be a *little* blurrier than normal- I don't want everything bright in
> the scene to glare out, like your sample code would do.  Here is my current
> light:
>
> light_source {
>   <-5000, 4000, 15000>
>   color rgb <0.8, 0.4, 0.2>*4.1
> }
>
> how would you turn this into a light with slightly fuzzier lines?
>
> Thanks!
> -ZA

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