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How can i take a light source and reflect the light off a mirror type
object and get both beams of light (incident and reflected) to show up
in media? I tried using photons and media.... but I cannot seem to get
the reflected light to interact with the media....
--
-------------------------------------------#
Paul Daniel Jones
307 Chandlee Laboratory
Penn State University
814-865-2090
pdj### [at] psu edu
http://research.chem.psu.edu/glassgrp/paul
--------------------------------------------#
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Paul Daniel Jones <pdj### [at] psuedu> wrote:
> How can i take a light source and reflect the light off a mirror type
> object and get both beams of light (incident and reflected) to show up
> in media? I tried using photons and media.... but I cannot seem to get
> the reflected light to interact with the media....
This is not how raytracing works. You probably want radiosity.
bye,
Chris
--
Christian Perle E-mail: chr### [at] tu-clausthalde
Am Galgensberg 4 WWW: http://home.tu-clausthal.de/~incp/
38678 Clausthal/Germany ComputerGuitarKitesBicyclesBeerPizzaRaytracing
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In article <399ad0eb@news.povray.org>, Christian Perle
<inc### [at] rztu-clausthalde> wrote:
> This is not how raytracing works. You probably want radiosity.
Radiosity doesn't do this type of thing either.
I believe he is asking about the photon mapping patch, which does
simulate this type of effect. However, I haven't looked at the most
recent versions of the patch, so I can't really help with this problem...
--
Christopher James Huff
Personal: e-mail chr### [at] maccom, Web page http://homepage.mac.com/chrishuff/
TAG: e-mail chr### [at] tagpovrayorg, Web page http://tag.povray.org/
><>
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"Paul Daniel Jones" <pdj### [at] psuedu> wrote in message
news:399A871D.3F000619@psu.edu...
| How can i take a light source and reflect the light off a mirror type
| object and get both beams of light (incident and reflected) to show up
| in media? I tried using photons and media.... but I cannot seem to get
| the reflected light to interact with the media....
Same thing for me. I tried and failed at it. I had used the 'media'
keyword inside the photon block and did everything I could think of. No
reflected light in the media, only on the walls, etc. Could still be a
number problem, as in lack of enough sampling and such. That and the fact
I've used a cylindrical spotlight, although trying with a regular spotlight
or point light source I hadn't had any luck seeing reflected light in the
media either.
Bob
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see Warps image on 3/27/00 in p.b.i...... I can't do this :-(
Paul Daniel Jones wrote:
> How can i take a light source and reflect the light off a mirror type
> object and get both beams of light (incident and reflected) to show up
> in media? I tried using photons and media.... but I cannot seem to get
> the reflected light to interact with the media....
>
> --
> -------------------------------------------#
> Paul Daniel Jones
> 307 Chandlee Laboratory
> Penn State University
> 814-865-2090
> pdj### [at] psuedu
>
> http://research.chem.psu.edu/glassgrp/paul
> --------------------------------------------#
--
-------------------------------------------#
Paul Daniel Jones
307 Chandlee Laboratory
Penn State University
814-865-2090
pdj### [at] psuedu
http://research.chem.psu.edu/glassgrp/paul
--------------------------------------------#
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I'm missing Fe. and Mar. here, I was looking for those related postings too.
Warp was faking it with multiple cylinders if IIRC.
Bob
"Paul Daniel Jones" <pdj### [at] psuedu> wrote in message
news:399AF346.B1BBE5E7@psu.edu...
| see Warps image on 3/27/00 in p.b.i...... I can't do this :-(
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On Wed, 16 Aug 2000 08:20:45 -0400, Paul Daniel Jones <pdj### [at] psuedu>
wrote:
>How can i take a light source and reflect the light off a mirror type
>object and get both beams of light (incident and reflected) to show up
>in media? I tried using photons and media.... but I cannot seem to get
>the reflected light to interact with the media....
Wasn't there something about a bug with cylinder lights and
photons/media? (in MegaPOV, that is)?
Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] usanet
TAG e-mail : pet### [at] tagpovrayorg
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"Peter Popov" <pet### [at] usanet> wrote in message
news:b75mpssrej1ur2jukptiit62v5cjm44hhh@4ax.com...
| On Wed, 16 Aug 2000 08:20:45 -0400, Paul Daniel Jones <pdj### [at] psuedu>
| wrote:
|
| >How can i take a light source and reflect the light off a mirror type
| >object and get both beams of light (incident and reflected) to show up
| >in media? I tried using photons and media.... but I cannot seem to get
| >the reflected light to interact with the media....
|
| Wasn't there something about a bug with cylinder lights and
| photons/media? (in MegaPOV, that is)?
I guess cylinder lights don't work perfectly with photons to begin with
somehow.
That's not the trouble, since I've tried it using a hole in the side of a
box and a point source. So it's nothing to do with not working with
spotlights either. Nathan has probably said before that media won't show a
reflected light, just not sure when or where if he did say so.
Bob
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In article <399b2031$1@news.povray.org>, "Bob Hughes"
<per### [at] aolcom?subject=PoV-News:> wrote:
> Nathan has probably said before that media won't show a reflected
> light, just not sure when or where if he did say so.
Actually, it *will* work. Media interaction is one of the features added
in one of the more recent versions. It takes a lot of computation time
and memory, but it works, and there was a laser-beam scene demonstrating
it. There is also a sample scene demonstrating media-photon
interaction(mediaphot.pov), maybe you should look at it for ideas.
I just am not familiar enough with the most recent version to figure out
the problem.
--
Christopher James Huff - Personal e-mail: chr### [at] maccom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://homepage.mac.com/chrishuff/
TAG Web page: http://tag.povray.org/
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"Chris Huff" <chr### [at] maccom> wrote in message
news:chrishuff-9FE4ED.21050216082000@news.povray.org...
| In article <399b2031$1@news.povray.org>, "Bob Hughes"
| <per### [at] aolcom?subject=PoV-News:> wrote:
|
| > Nathan has probably said before that media won't show a reflected
| > light, just not sure when or where if he did say so.
|
| Actually, it *will* work. Media interaction is one of the features added
| in one of the more recent versions. It takes a lot of computation time
| and memory, but it works, and there was a laser-beam scene demonstrating
| it. There is also a sample scene demonstrating media-photon
| interaction(mediaphot.pov), maybe you should look at it for ideas.
Okay, I got it now, thanks so much for pointing out that sample scene file.
All I had to do is set reflection to on in the sphere and I saw the
spotlight shining back from it. Great thing. Now I have gotten a cylinder
spotlight to actually show up too, the weird thing is there wasn't really
any obvious reason for the not-working and working ways. It's almost
metamorphosing the more I try to use it. Typical thing because of so many
possible media settings I guess. I at first even thought it was all because
of the sample file having a 'media on' in the photon block. Not so. I
tried with and without and get the laser light reflected in the media.
Curious to say the least. I'm going to post this test render I have to
p.b.i. in a few minutes so it will prove to others it can be done.
Bob
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