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From: Andrew Cocker
Subject: Re: Possible atmospheric solution?
Date: 7 Mar 1999 19:17:32
Message: <36e3171c.0@news.povray.org>
HI Ken,

That was quick! Do you have a permanent internet connection, or free local calls? If
so,

Have you had any luck with your consequtive images/

---------
Andy

Ken wrote in message <36E31469.905C54F4@pacbell.net>...

>  This topic and the solutions you have suggested were discussed in
>some detail back in January. I believe the thrust of the discussion
>centered aorund the use of monte carlo sampling and it's limitions.
>I tmight have been Nathan Kopp who mentioned tht he has been trying
>different sampling methods to be used with the media feature and has
>passed on the concerns of people about the process to Chris Young
>the pov team coordinator. I guess you could say there is work in
>progress to add more functinality to the media process but I have
>no confirming data to support this. I do agree that there are some
>sampling methods like that used in the previous atmosphere feature that
>could add greater funtionality to the current system and it would be
>nice to see some improvements in that area.
>
>--
>Ken Tyler
>
>mailto://tylereng@pacbell.net


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From: Ken
Subject: Re: Possible atmospheric solution?
Date: 7 Mar 1999 19:29:37
Message: <36E3193A.BDB019@pacbell.net>
Andrew Cocker wrote:
> 
> HI Ken,
> 
> That was quick! Do you have a permanent internet connection, or free local calls? If
so,

> Have you had any luck with your consequtive images/
> 
> ---------
> Andy


 I get about 140 hrs. per month fixed rate internet access through my
phone company and a fixed monthly rate for all phone calls to the
dialup connection in my calling area. My phone bill with internet
access and normal phone usage, i.e. no long distance calls, runs less
than $40 a month US. That's less than most US families pay with no
internet connection but have two teenagers in their house.

 As far as the other project I have had no success making it work. Either
I am too dense or there is something wrong with the exapmles given me so
far. I can get the include file method to work but can't seem to figure
out how to use successive images to create height fields as I am tring
to do.
  The HF statement want's a syntax of:

height_field {"tga "xxx.tga"  stuff }

 I can't figure out how to use the code provided to satisfy it's need
for the - tga "xxx.tga" - part of the syntax. If you have any suggestions
I am willing to listen to your advice.

-- 
Ken Tyler

mailto://tylereng@pacbell.net


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From: Andrew Cocker
Subject: Re: Possible atmospheric solution?
Date: 7 Mar 1999 19:39:07
Message: <36e31c2b.0@news.povray.org>
Ken wrote in message <36E### [at] pacbellnet>...
>
> I get about 140 hrs. per month fixed rate internet access through my
>phone company and a fixed monthly rate for all phone calls to the
>dialup connection in my calling area. My phone bill with internet
>access and normal phone usage, i.e. no long distance calls, runs less
>than $40 a month US. That's less than most US families pay with no
>internet connection but have two teenagers in their house.
>


Damn..why don't we get that over here? I have a free internet connection, but British
Telecom charge lots and lots


> As far as the other project I have had no success making it work. Either
>I am too dense or there is something wrong with the exapmles given me so
>far. I can get the include file method to work but can't seem to figure
>out how to use successive images to create height fields as I am tring
>to do.
>  The HF statement want's a syntax of:
>
>height_field {"tga "xxx.tga"  stuff }
>
> I can't figure out how to use the code provided to satisfy it's need
>for the - tga "xxx.tga" - part of the syntax. If you have any suggestions
>I am willing to listen to your advice.
>

Presumably you'll have tried

height_field { tga INCF stuff }

from my solution. I'll have a go myself and get back to you shortly if I come up with
a
solution.


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From: Mike
Subject: Re: Possible atmospheric solution?
Date: 7 Mar 1999 22:58:31
Message: <36E349A2.60E4BCC7@aol.com>
The same guy who came up with the photon mapping idea wrote a paper
decribing how to extend it to work with participating media too.  I
don't know if Nathan has this paper, but it would be neat if it could be
worked into POV sometime down the road.

It can handle caustics in media and even diffuse <-> volume light
transfer!  :)

-Mike
 
>   This topic and the solutions you have suggested were discussed in
> some detail back in January. I believe the thrust of the discussion
> centered aorund the use of monte carlo sampling and it's limitions.
> I tmight have been Nathan Kopp who mentioned tht he has been trying
> different sampling methods to be used with the media feature and has
> passed on the concerns of people about the process to Chris Young
> the pov team coordinator. I guess you could say there is work in
> progress to add more functinality to the media process but I have
> no confirming data to support this. I do agree that there are some
> sampling methods like that used in the previous atmosphere feature that
> could add greater funtionality to the current system and it would be
> nice to see some improvements in that area.
> 
> --
> Ken Tyler
> 
> mailto://tylereng@pacbell.net


Post a reply to this message

From: Nathan Kopp
Subject: Re: Possible atmospheric solution?
Date: 7 Mar 1999 23:19:11
Message: <36E34FA2.7187E2E7@Kopp.com>
I read the paper (very nice images in it).  But you'll notice that, unlike
the original work that Jensen did on photon maps (which ran on a low-end
linux box), the atmospheric stuff was rendered on an 8 (or was it 16?)
processor graphics workstation with many, many megabytes of memory.

I do plan to implement it, but it's not top priority right now.  First,
I want to work on finishing photon mapping for caustics, then make it
work with radiosity.  Also, I want to have a closer look at media to
try to get back the adaptive sampling method before introducing volume
photons.

-Nathan

Mike wrote:
> 
> The same guy who came up with the photon mapping idea wrote a paper
> decribing how to extend it to work with participating media too.  I
> don't know if Nathan has this paper, but it would be neat if it could be
> worked into POV sometime down the road.
> 
> It can handle caustics in media and even diffuse <-> volume light
> transfer!  :)
>


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From: Bob Hughes
Subject: Re: Possible atmospheric solution?
Date: 8 Mar 1999 00:28:32
Message: <36E35FC5.64193743@aol.com>
PoDs Saturday reply to that Consecutive frames thread is all you really
need to make that work. Just put FileName in place of the "*.tga". Don't
use quotes.


Ken wrote:
> 
>  As far as the other project I have had no success making it work. Either
> I am too dense or there is something wrong with the exapmles given me so
> far. I can get the include file method to work but can't seem to figure
> out how to use successive images to create height fields as I am tring
> to do.
>   The HF statement want's a syntax of:
> 
> height_field {"tga "xxx.tga"  stuff }
> 
>  I can't figure out how to use the code provided to satisfy it's need
> for the - tga "xxx.tga" - part of the syntax. If you have any suggestions
> I am willing to listen to your advice.
> 
> --
> Ken Tyler
> 
-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/POVring.htm
 mailto:inv### [at] aolcom?PoV


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From: Ken
Subject: Re: Possible atmospheric solution?
Date: 8 Mar 1999 01:50:45
Message: <36E3728C.D9D8E7E@pacbell.net>
Bob Hughes wrote:
> 
> PoDs Saturday reply to that Consecutive frames thread is all you really
> need to make that work. Just put FileName in place of the "*.tga". Don't
> use quotes.
> 

It was the quotes that was hanging me up. Got it going a while ago with
Andrews help.

-- 
Ken Tyler

mailto://tylereng@pacbell.net


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From: Equiprawn
Subject: Re: Possible atmospheric solution?
Date: 9 Mar 1999 13:16:40
Message: <36e56588.0@news.povray.org>
>Damn..why don't we get that over here?

Your luck might change soon. I live in Ireland, and at the moment, one of
our telecommunications companies is trying to get a bill passed by the
minister for telecommunications that will give Telecom Internet users a

long you stay online. If the bill is passed, then this trend could spread to
the rest of the EU. Wouldn't that be cool?

Equiprawn


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From: Stephen Lavedas
Subject: Re: Possible atmospheric solution?
Date: 9 Mar 1999 20:54:39
Message: <36E5D0E1.C309F822@virginia.edu>
> 
> Damn..why don't we get that over here? I have a free internet connection, but
British
> Telecom charge lots and lots
> 
It is your digital phone lines.  We with our old outmoded analog lines
enjoy a few benefits.  That and it seems many things are cheaper in the
US.  (Kinda surprised me)

Steve


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From: Cliff Bowman
Subject: Re: Possible atmospheric solution?
Date: 11 Mar 1999 13:24:55
Message: <36e7e4ec.71346418@news.povray.org>
On Mon, 8 Mar 1999 00:36:05 -0000, "Andrew Cocker"
<and### [at] acockerfreeservecouk> wrote:

>
>Ken wrote in message <36E### [at] pacbellnet>...
>>
>> I get about 140 hrs. per month fixed rate internet access through my
>>phone company and a fixed monthly rate for all phone calls to the
>>dialup connection in my calling area. My phone bill with internet
>>access and normal phone usage, i.e. no long distance calls, runs less
>>than $40 a month US. That's less than most US families pay with no
>>internet connection but have two teenagers in their house.
>>
>
>
>Damn..why don't we get that over here? I have a free internet connection, but British
>Telecom charge lots and lots
>
Indeed they do - and so do the competition. However - one of the other
"free" ISP's in the UK has an interesting (perhaps) deal going during
weekends this month. friday midnight to Sunday midnight you can use an
0800 number (i.e. FREE) to connect. the downside (as I understand it -
not tried them yet) is that you must use their software, which
downloads and displays adverts to you. However - if the ISP is free
and the telephone cost is free - will the adverts be that much of a
problem?

the ISP in question is x-stream - I'd guess you can find them at
http://x-stream.com (maybe you'll need a www. stuck in there too if
that doesn't work).

Hope this is of use...


Cheers,

Cliff Bowman
Why not pay my 3D Dr Who site a visit at
http://www.geocities.com/Area51/Dimension/7855/
PS change ".duffnet" to ".net" if replying via e-mail


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