POV-Ray : Newsgroups : povray.advanced-users : Media photons : Media photons Server Time
29 Jul 2024 08:13:00 EDT (-0400)
  Media photons  
From: Andrew Coppin
Date: 25 Sep 2002 11:49:10
Message: <3d91daf6@news.povray.org>
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I can't get media photons to work.

I'm working on a tank full of water. (See povray.binaries.images -
"The Tank".) As you can see, I've already got some wonderful caustics
on the floor using photon mapping. So I thought it would be nice to
have shards of light in the water itself as well. I added some
scattering media to the water and turned on media photons. POV-Ray
spent 45 mins trying to make Swiss cheese out of my harddrive, then
gave up and said I didn't have enough memory. So I tried reducing the
number of photons. This time, POV-Ray spend a few hours shooting
photons, eventually dumping a photon map file of over 600MB. It took
*ages* to render the thing - the harddrive was paging on every line!
And when it did finish, the image was almost totally black.
(Presumably because there's not enough photons.)

So I was wondering... Is the media photons feature supposed to work?
Or did they implement it so that in 10 years' time there will be
computers powerful enough to do it? My machine is a 1.4GHz AMD with
256MB of RAM - hardly low spec!

Any ideas?
Andrew.

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