I don't want to be below this giant crystal sphere...

Sven   :-)



"William Tracy" <wtr### [at] calpolyedu> schrieb im Newsbeitrag 
news:47b4f08a@news.povray.org...
>A Refractive Sphere on a Checkered Plain. (BTW, Archpawn, I *really*
> wish I'd come up with that pun myself.)
>
> The photons notwithstanding ;-) this is my test bed for a cheap
> radiosity substitute.
>
> Ambient wasn't doing it for me, since it is completely omnidirectional.
> I want surfaces facing upward (the ground) to get more light from the
> sky than vertical surfaces (tree trunks). Without taking this into
> account, the tree trunks tend to look like they glow in the dark (look
> at the tiles that Nicolas posted from his super render, and you can see
> what I'm talking about).
>
> I'm playing with a custom lighting system derived from Tek's light dome.
> Normally, the light dome is significantly slower than radiosity. I tried
> hacking some of the quality optimizations out of his code and
> dramatically decreasing the light count (from 30+ to 5) without making
> much of a dent.
>
> The secret is to make all the lights in the dome shadowless. My original
> IRTC render took ~3 hours; this image, at the same resolution and AA
> settings, took just over thirty minutes to render. Not too shabby. :-)
>
> -- 
> William Tracy
> afi### [at] gmailcom -- wtr### [at] calpolyedu
>
>    "I don't hink it helps to make analagies between the physical and
> social worlds," Sax said primly.
>    "Shut up, Sax. Go back to your virtual reality."
>     -- Kim Stanley Robinson, _Red Mars_
>

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