POV-Ray : Newsgroups : povray.binaries.images : Caustics, caustics... : Re: Caustics, caustics... Server Time
4 Oct 2024 15:14:45 EDT (-0400)
  Re: Caustics, caustics...  
From: Nathan Kopp
Date: 17 Mar 1999 16:22:31
Message: <36F01CC7.90530177@Kopp.com>
Looks great!  Nice modeling on the glass.

Those bright splotches don't look right (I don't think I've seen anything
like that in reality).  They may be a bug.  Any chance you can email me
(or post) the code?

The reflective caustics do add a nice touch to the scene.  400k photons
is not too much for a scene (probably overkill for this particular scene,
though).  I am surprised at the parse time (since that's basically spent
shooting photons) and the render time for that matter... how high did
you set your max_trace_level?

-Nathan

Margus Ramst wrote:
> 
> OK, you've already seen caustics with blobs, trees, birds... But have you
> seen the caustics of a fine glass of liquor...? You have? Well, have some
> more!
> This damn thing took 30 minutes to parse and 17 hours to trace on my
> PII416/64MB - mainly because reflections, but also because I turned on
> reflected caustics on the glass (you _can_ see them, can't you?). Also, AA
> had to be set to 0.1
> For my next feat, I'll add some ice cubes (with media interior, reflections
> and caustics), add reflections/reflected caustics to the whiskey and remove
> "ignore_photons" from the glass. Then I'll take a nice 3-year vacation in
> Burundi and hope to see it ready when I get back...
> 
> The glass itself is simple CSG, needs some work. I feel there is something
> wrong with the refractions (at least upper part, where top of the wiskey
> meets the glass).
> 
> It used 481,317 photons (overkill?), density .015, radius .15,2,.15. Whiskey
> had refraction on, the glass had refrection & reflection on and
> ignore_photons set.
> I can only hope that the bright splotches are caustics from the
> ornamentation on the glass.
> 
> Margus
> 
>  [Image]


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