With the official release of POV-Ray v3.0 was an example scene file
from Dan Farmer illustrating the new atmosphere feature. The scene
file is called "Matches". When the POV-Team dropped the atmosphere
feature in favor of the media feature in POV-Ray v3.1 they had to
discontinue distributing that file because it was not compatible.

With the addition of the method 3 media in MegaPov I thought I would
see if I could revive that long lost file and below you will find the
results of my efforts. While there are some very minor differences I
am for the most part satisfied with results. The surprising part was
how little time it took me to modify the scene to work with media. I
would say my development time was not much more than about 45 min. and
most of that was time spent in the render -> evaluate cycles.

Render time 3 hrs. 640x480 aa 0.3 on a 200 Mhz pentium

I don't have the render stats for the atmoshphere version but it was
at least as long if not longer.

MatchesA.jpg = with Atmosphere
MathcesM.jpg = with Media Method 3

-- 
Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

Post a reply to this message

Attachments:
Download 'matchesa.jpg' (41 KB) Download 'matchesm.jpg' (36 KB)

Preview of image 'matchesa.jpg'

Preview of image 'matchesm.jpg'

Interesting.
Can you explain the difference in the "shadow" caused by the left-most match,
in each system? In the Atmosphere, it looks as is light travels in curves, and
in the media it makes the thing look a bit fake.

Ken wrote:

>  With the official release of POV-Ray v3.0 was an example scene file
> from Dan Farmer illustrating the new atmosphere feature. The scene
> file is called "Matches". When the POV-Team dropped the atmosphere
> feature in favor of the media feature in POV-Ray v3.1 they had to
> discontinue distributing that file because it was not compatible.
>
> With the addition of the method 3 media in MegaPov I thought I would
> see if I could revive that long lost file and below you will find the
> results of my efforts. While there are some very minor differences I
> am for the most part satisfied with results. The surprising part was
> how little time it took me to modify the scene to work with media. I
> would say my development time was not much more than about 45 min. and
> most of that was time spent in the render -> evaluate cycles.
>
> Render time 3 hrs. 640x480 aa 0.3 on a 200 Mhz pentium
>
> I don't have the render stats for the atmoshphere version but it was
> at least as long if not longer.
>
> MatchesA.jpg = with Atmosphere
> MathcesM.jpg = with Media Method 3
>
> --
> Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
> http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
>
>   ------------------------------------------------------------------------
>  [Image]  [Image]

Post a reply to this message

Hm, the picture with the media has a shadow in the flame... If that
could be made go away it'd look the same for me.

CU,
Christian

Post a reply to this message

I like the atmosphere one better, but it may just be a matter of tweaking.

--
___     _______________________________________________
 | \     |_          <dav### [at] faricynet> <ICQ 55354965>
 |_/avid |ontaine        http://www.faricy.net/~davidf/

"The only difference between me and a madman is that I'm not mad." -Dali

Post a reply to this message

Lighting is dimmed or something in the media version, those missing sections in
the flame don't look right.  It is a smooth flame though compared.  I see that
there were 17 lights used in that for the flame, I had thought that was using
'halo'.  I know everyone keeps saying you don't need to specify more than
'intervals 1' but I've seen it can help anyhow if it's increased.

Bob

"Ken" <tyl### [at] pacbellnet> wrote in message
news:38E7AB01.A55E546E@pacbell.net...
|
|
|  With the official release of POV-Ray v3.0 was an example scene file
| from Dan Farmer illustrating the new atmosphere feature. The scene
| file is called "Matches". When the POV-Team dropped the atmosphere
| feature in favor of the media feature in POV-Ray v3.1 they had to
| discontinue distributing that file because it was not compatible.
|
| With the addition of the method 3 media in MegaPov I thought I would
| see if I could revive that long lost file and below you will find the
| results of my efforts. While there are some very minor differences I
| am for the most part satisfied with results. The surprising part was
| how little time it took me to modify the scene to work with media. I
| would say my development time was not much more than about 45 min. and
| most of that was time spent in the render -> evaluate cycles.
|
| Render time 3 hrs. 640x480 aa 0.3 on a 200 Mhz pentium
|
| I don't have the render stats for the atmoshphere version but it was
| at least as long if not longer.
|
| MatchesA.jpg = with Atmosphere
| MathcesM.jpg = with Media Method 3
|
| --
| Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
| http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/


--------------------------------------------------------------------------------






--------------------------------------------------------------------------------

Post a reply to this message

I gave this a try too.  At first I couldn't get any of the media to show up but
when it did it looked okay.  So from there I figured what it needed for the
flames lighting to show up better on the neighboring matches was to use
radiosity.
You might want to do a correct aspect ratio render Ken.  It makes a big
difference as you will see here, I made this 270 width by 300 height for the 9
by 10 ratio suggested in the scene file.  The media was:
  media {
    method 3
    intervals 3
    samples 3,3
absorption <.15,.1,.05>*.025
    scattering {1,rgb 0.234 extinction 0.0133}
}

Under 16 minutes to render with +QR +a0.25 +r2 +am2 on a PIII 500MHz

Bob

Post a reply to this message

Attachments:
Download 'match_mp.jpg' (16 KB)

Preview of image 'match_mp.jpg'

Nice work Ken.  Hope you're gonna share the media code.
-- 
Cheers
Steve              email mailto:sjl### [at] ndirectcouk

%HAV-A-NICEDAY Error not enough coffee  0 pps. 

web http://www.ndirect.co.uk/~sjlen/

or  http://start.at/zero-pps

 11:14am  up 2 days, 19:50,  4 users,  load average: 1.15, 1.12, 1.04

Post a reply to this message