POV-Ray : Newsgroups : povray.general : odd behavior of photon reflection/refraction defaults Server Time
15 Dec 2025 22:04:12 EST (-0500)
  odd behavior of photon reflection/refraction defaults (Message 11 to 15 of 15)  
<<< Previous 10 Messages Goto Initial 10 Messages
From: Kenneth
Subject: Re: odd behavior of photon reflection/refraction defaults
Date: 12 Dec 2025 05:50:00
Message: <web.693bf28f874e57e8e83955656e066e29@news.povray.org>
"Kenneth" <kdw### [at] gmailcom> wrote:
>
> I was thinking in terms of 'number' of photons rather
> than spacing:
>
> target 0.5-- the spacing between photons is reduced by half...whereas the number
> of photons is...either doubled or quadrupled(?)-- like spacing/2
> (or spacing/4 ?)
>

"...like spacing/2 or spacing/4" ???

Please ignore that bad analogy and arithmetic-- a result of 'over-thinking' :-[


Post a reply to this message

From: jr
Subject: Re: odd behavior of photon reflection/refraction defaults
Date: 12 Dec 2025 06:45:00
Message: <web.693bff1f874e57e8475fba6a6cde94f1@news.povray.org>
hi,

"Kenneth" <kdw### [at] gmailcom> wrote:
> "Kenneth" <kdw### [at] gmailcom> wrote:
> > I was thinking in terms of 'number' of photons rather
> > than spacing:
> > target 0.5-- the spacing between photons is reduced by half...whereas the number
> > of photons is...either doubled or quadrupled(?)-- like spacing/2
> > (or spacing/4 ?)
>
> "...like spacing/2 or spacing/4" ???
> Please ignore that bad analogy and arithmetic-- a result of 'over-thinking' :-[

no worries (hope that sort of thing doesn't keep you awake at night </grin>).

agree re the 'target', its description, will do that in the coming days.  how do
you fancy "having a go" at turning the "Perfect Mirror" thread in to a "FAQ"
item ?  (or a draft for an added "Tip" based on your observations ?)


regards, jr.


Post a reply to this message

From: jr
Subject: Re: odd behavior of photon reflection/refraction defaults
Date: 12 Dec 2025 06:45:00
Message: <web.693bffc6874e57e8475fba6a6cde94f1@news.povray.org>
hi,

"Bald Eagle" <cre### [at] netscapenet> wrote:
> I had a window of time today, and set The AI to work on this.
>
> I have diagrams and charts and flowcharts and code.
>
> Still need to go through it all and test it out.
> I can post or forward the zips if you'd like.

keep "us" in the loop please, wrt testing etc.


regards, jr.


Post a reply to this message

From: Bald Eagle
Subject: Re: odd behavior of photon reflection/refraction defaults
Date: 12 Dec 2025 08:45:00
Message: <web.693c1b98874e57e89839f6ab25979125@news.povray.org>
"jr" <cre### [at] gmailcom> wrote:

> keep "us" in the loop please, wrt testing etc.

I have a lot of running around to do, so I'll only be able to sporadically play
with the output.

I'll post a zip of all the files that were generated, and maybe we can all
run/edit/debug the code, etc. and come up with something that makes sense.

One thing that I did was have it generate ALL the possible permutations of light
source and object, and I would suggest that part of the distribution be a scene
that renders all the permutations.  That ought to put an end to any questions
about how povray actually operates.

- BE


Post a reply to this message


Attachments:
Download 'photons.zip' (1058 KB)

From: jr
Subject: Re: odd behavior of photon reflection/refraction defaults
Date: 13 Dec 2025 03:20:00
Message: <web.693d20d5874e57e8475fba6a6cde94f1@news.povray.org>
hi,

"Bald Eagle" <cre### [at] netscapenet> wrote:
> ...
> One thing that I did was have it generate ALL the possible permutations of light
> source and object, and I would suggest that part of the distribution be a scene
> that renders all the permutations.  That ought to put an end to any questions
> about how povray actually operates.

yes agree, a simple, "good" .pov/.ini combo which generates a corresponding set
of images would be very useful to have.  (if we had one "in hand", we could
start "badgering" Chris :-))


regards, jr.


Post a reply to this message

<<< Previous 10 Messages Goto Initial 10 Messages

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.