POV-Ray : Newsgroups : povray.advanced-users : Media photons : Re: Media photons Server Time
29 Jul 2024 08:15:27 EDT (-0400)
  Re: Media photons  
From: Andrew Coppin
Date: 25 Sep 2002 16:26:35
Message: <3d921bfb@news.povray.org>
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As always, thanks you your replies people :-)

Maybe I was a little unclear... The image looks fine with scattering
media. (I had to play around with the exact density so that you get
enough scattering to see some effect, but not so much that it's like
a glass of milk!) It's only when I turned on media photons that
things went wrong. I got an almost totally black image, with just a
few dark-red "specks" here and there. (The media is slightly
blue-ish, to make it look more "watery".)

I have to say that I did all this a few weeks ago, before I
discovered this news server, and I can't seem to find the actual
image itself (the one with media photons turned on). And buggered if
I'm going to render it again! Was just checking whether what I'm
trying to do is actually impossible or whether I've just got the
settings wrong... To do the original image (the one I posted), I just
put "photons {}" into global_settings and it all worked perfectly.
Clearly I'll have to try harder to get media photons to work...

Andrew.

PS. It probably doesn't help that the water is an isosurface... Might
it be faster if the water were a normal box with an isosurface CSG'd
off the top? (I.e., so POV-Ray only has to do isosurface tests on the
upper-part of the image.)

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