Chambers wrote:

> I remember when you could render a few simple spheres, and use the
> pixels appearing on screen as a rather accurate stopwatch!

 10:45:33 Rendering line 103 of 768, 1469 supersamples, 25893 rad. samples

Old scene, never before rendered for some mystical reason. And yes, that
is running on 2,3GHz A64 with enough RAM, so it's not exactly 286-time
any more...

> And a render isn't slow unless it won't finish until after your next
> birthday :)

Well, I have almost a year to cover that, so no problem!

> ...Ben Chambers
> www.pacificwebguy.com

-Aero

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Well, I meant too long considering it was a test scene. I started out with 
POV-Ray for DOS on a 166mhz system, so I appreciate the processing power 
available these days.

I did this final render of this scene and wasn't going to post it because I 
wasn't happy with it. It took 6d 9h 27m to render at 1920x1200.

-Mike

"Chambers" <ben### [at] pacificwebguycom> wrote in message 
news:BCF7900EDDC2420A8E99F8E588279E1B@HomePC...
>> -----Original Message-----
>> From: Mike Hough [mailto:nos### [at] nospamcom]
>> Took 10 hours 30 minutes to render this which is way too long.
>
> Kids!
>
> I remember when you could render a few simple spheres, and use the
> pixels appearing on screen as a rather accurate stopwatch!
>
> And a render isn't slow unless it won't finish until after your next
> birthday :)
>
> (Hmm... I think I'll use that as my new sig!)
>
> ...Ben Chambers
> www.pacificwebguy.com
>
> A render isn't slow unless it won't finish until after your next
> birthday.
>
>
>

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Attachments:
Download 'rainbow2.jpg' (200 KB)

Preview of image 'rainbow2.jpg'

Mike Hough nous illumina en ce 2008-12-22 04:07 -->
> Well, I meant too long considering it was a test scene. I started out with 
> POV-Ray for DOS on a 166mhz system, so I appreciate the processing power 
> available these days.
> 
> I did this final render of this scene and wasn't going to post it because I 
> wasn't happy with it. It took 6d 9h 27m to render at 1920x1200.
> 
> -Mike
> 
> "Chambers" <ben### [at] pacificwebguycom> wrote in message 
> news:BCF7900EDDC2420A8E99F8E588279E1B@HomePC...
>>> -----Original Message-----
>>> From: Mike Hough [mailto:nos### [at] nospamcom]
>>> Took 10 hours 30 minutes to render this which is way too long.
>> Kids!
>>
>> I remember when you could render a few simple spheres, and use the
>> pixels appearing on screen as a rather accurate stopwatch!
>>
>> And a render isn't slow unless it won't finish until after your next
>> birthday :)
>>
>> (Hmm... I think I'll use that as my new sig!)
>>
>> ...Ben Chambers
>> www.pacificwebguy.com
>>
>> A render isn't slow unless it won't finish until after your next
>> birthday.
>>
>>
>>
> 
> 
Still a problem: the two arches are NOT coventrical!
Apart from that, nice.

-- 
Alain
-------------------------------------------------
Database administrators do it with their relations

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On 22-Dec-08 10:07, Mike Hough wrote:
> Well, I meant too long considering it was a test scene. I started out with 
> POV-Ray for DOS on a 166mhz system, so I appreciate the processing power 
> available these days.
> 
> I did this final render of this scene and wasn't going to post it because I 
> wasn't happy with it. It took 6d 9h 27m to render at 1920x1200.


I think the inner should be brighter than the outer. Also I have this 
feeling that the angles are not completely right nor does it match the 
position of the sun. If you take a line from the sun through the eye of 
the observer then the line from any point of a certain color on the 
rainbow to the eye will make a constant (and universal) angle to that 
sun-eye line. If this makes sense to you. ;) The same holds for the 
secondary rainbow.

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Nice, but there seem to be shadowy *reflections* of mountains in the plane 
of the rainbow. What are those?

Thomas

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They are the shadows of the mountains blocking the light from hitting the 
media "clouds". I did not notice them until around day 3. Only solution 
would be more samples.


"Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote in message 
news:4951ee24$1@news.povray.org...
>
> Nice, but there seem to be shadowy *reflections* of mountains in the plane 
> of the rainbow. What are those?
>
> Thomas
>
>

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Take a glance at this one...
The image was rendered within one week on a Pentium DualCore 3.6Ghz with 2GB
RAM; I don't know the exact time it took to render though, because I stopped
and continued tracing several times. For this image, I used Jaime Vives
Piqueres' 'Project Tierra' landscape include files and my own ones for the
rainbow, and I'm quite happy with the result. Still I'm using emitting media
rather than scattering one, because it renders faster and my include file
contains the possibility to 'project' a pattern onto the rainbow, e.g. clouds,
to get the illusion of a 'broken' rainbow (not used in this image, but
possible, if someone liked to use this feature).

Mike, your rainbow seems a little bit too 'perfect' to me, like it was an
illustration taken from a fairy tale book; most of all because of the powerful
colors. Maybe this is your aim, because the viewer still gets a very special
impression in this case, I don't know. If you wanted to achieve that, you are
going into the right direction (yes, I like the image; put a crystal dragon
into the scene and I would like it even more!) But for getting an image with a
more realistic look, you should work on the colors and angles of the rainbow
once more. One more thing to say, I wonder about your rendering times... what
is it that kills your processor speed, the rainbow media or the landscape
isosurface? By default, my rainbow media only takes 2 media intervals. There is
no need of taking more intervals in normal cases, beacause I tweaked the density
function in a way so that it renders nearly like the inbuilt 'fog' feature in
pov-ray (assuming that reflecting water droplets are distributed constantly
along the viewing ray). Hope this helps a little bit.

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Attachments:
Download 'tierra_ls_01.jpg' (379 KB)

Preview of image 'tierra_ls_01.jpg'

Another scene, another rainbow...

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Attachments:
Download 'ls_2-55-11_rb2.jpg' (686 KB)

Preview of image 'ls_2-55-11_rb2.jpg'

"Florian Siegmund" <flo### [at] gmxat> schreef in bericht 
news:web.4952dba2619c0ff387129fc00@news.povray.org...
> Another scene, another rainbow...
>

Great ones, both of them!

One thing I wonder about is the difference of luminosity of the landscape 
inside and outside of the rainbow. I am not sure if this is a RL feature. 
Been a while since I last saw a perfect rainbow :-)  Maybe one should be 
able to see the haze of the rain shower instead...

Thomas

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Wasn't it Thomas de Groot who wrote:

>One thing I wonder about is the difference of luminosity of the landscape
>inside and outside of the rainbow. I am not sure if this is a RL feature.

Yes. The lightness of the rainbow itself has to come from somewhere. 
Some of the light that would have come from the dark "Alexander's band" 
as you see the rainbow is deflected to make the bright coloured stripes 
of rainbows that are seen by people standing beside you.

http://en.wikipedia.org/wiki/Alexander%27s_band

-- 
Mike Williams
Gentleman of Leisure

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