Daniel Matthews wrote:
>
> i.e in a hollow where things collect you can see the rim edge, but on a
> hill you can't, the deeper and more narrow you hollow the more of the sky
> is obscured by the surrounding walls. So on a hill top all the grime is
> removed as it has no shelter.

This is exactly what I did with the radiosity patina. When
recursion_level 1 is used the illumination on the surface
tells directly how much "outside" is visible from that point.

news://news.povray.org/3B8DD549.D0A9588E%40engineer.com
news://news.povray.org/3B8E0F26.6DDC17B3%40engineer.com


_____________
Kari Kivisalo

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