POV-Ray : Newsgroups : povray.binaries.images : The Blue and Gold Server Time: 23 Oct 2019 03:31:54 GMT
  The Blue and Gold (Message 1 to 6 of 6)  
From: Cousin Ricky
Subject: The Blue and Gold
Date: 10 Oct 2019 00:55:33
Message: <5d9e8185@news.povray.org>
This is a tribute to my high school alma mater, Charlotte Amalie High 
School in the Virgin Islands.

This was a 3-pass render:

   1. A photons pass with no trees on the hills.  For some reason, the
      shooting of photons stalls when the trees are included, though I
      cannot see how the trees would interfere with the process.  It is
      only a small section of the checkered plane that receives
      photons.  ("Either be patient or do not shoot photons at infinite
      objects." --Reference Manual)

      Photon mapping was also faulty with the scene as-is, but when I
      inserted a patio into the scene, the photons were perfect.  I
      couldn't figure out why that is.  The patio was removed for the
      final render.

   2. A radiosity pass with no trees on the hills (they take a long
      time to parse) and no rounded edges on the monogram.

   3. The final pass with trees, the previously saved photons, and the
      previously saved radiosity.

"Chicken hawk" here refers to the red-tailed hawk, /Buteo jamaicensis/, 
which is often seen here in the Caribbean.  I could tell immediately 
that one of my coworkers went to the same high school when she thought 
the bird on the VI flag was a chicken hawk.  It is actually an 
oddly-colored bald eagle, as it is immediately obvious at a glance that 
our flag was bequeathed to us by the colonizer: 
https://commons.wikimedia.org/wiki/File:Flag_of_the_United_States_Virgin_Islands.svg

If people are interested, I will post the code for the rounded edges in 
p.t.scene-files.


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From: Cousin Ricky
Subject: Re: The Blue and Gold
Date: 10 Oct 2019 01:15:04
Message: <5d9e8618$1@news.povray.org>
On 2019-10-09 8:55 PM (-4), Cousin Ricky wrote:
> This is a tribute to my high school alma mater, Charlotte Amalie High 
> School in the Virgin Islands.


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From: Cousin Ricky
Subject: Re: The Blue and Gold
Date: 10 Oct 2019 01:17:18
Message: <5d9e869e@news.povray.org>
On 2019-10-09 8:55 PM (-4), Cousin Ricky wrote:
> This is a tribute to my high school alma mater, Charlotte Amalie High 
> School in the Virgin Islands.

Here is a render with flint glass backing.


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From: Thomas de Groot
Subject: Re: The Blue and Gold
Date: 10 Oct 2019 07:01:08
Message: <5d9ed734@news.povray.org>
Op 10/10/2019 om 02:55 schreef Cousin Ricky:
> This was a 3-pass render:
> 

You did an excellent job indeed. Well done.

-- 
Thomas


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From: Alain Martel
Subject: Re: The Blue and Gold
Date: 10 Oct 2019 18:33:27
Message: <5d9f7977$1@news.povray.org>
Le 2019-10-09 à 20:55, Cousin Ricky a écrit :
> This is a tribute to my high school alma mater, Charlotte Amalie High 
> School in the Virgin Islands.
> 
> This was a 3-pass render:
> 
>    1. A photons pass with no trees on the hills.  For some reason, the
>       shooting of photons stalls when the trees are included, though I
>       cannot see how the trees would interfere with the process.  It is
>       only a small section of the checkered plane that receives
>       photons.  ("Either be patient or do not shoot photons at infinite
>       objects." --Reference Manual)
> 
>       Photon mapping was also faulty with the scene as-is, but when I
>       inserted a patio into the scene, the photons were perfect.  I
>       couldn't figure out why that is.  The patio was removed for the
>       final render.
> 
>    2. A radiosity pass with no trees on the hills (they take a long
>       time to parse) and no rounded edges on the monogram.
> 
>    3. The final pass with trees, the previously saved photons, and the
>       previously saved radiosity.
> 
> "Chicken hawk" here refers to the red-tailed hawk, /Buteo jamaicensis/, 
> which is often seen here in the Caribbean.  I could tell immediately 
> that one of my coworkers went to the same high school when she thought 
> the bird on the VI flag was a chicken hawk.  It is actually an 
> oddly-colored bald eagle, as it is immediately obvious at a glance that 
> our flag was bequeathed to us by the colonizer: 
> https://commons.wikimedia.org/wiki/File:Flag_of_the_United_States_Virgin_Islands.svg

> 
> 
> If people are interested, I will post the code for the rounded edges in 
> p.t.scene-files.

For those trees and photons : You can set the trees so that they don't 
receive any photons with : photons{collect off}

You can replace the trees with some place holder in the initial phases.

Even for the final pass, it may be possible to use a «billboard» that 
show the trees.


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From: Cousin Ricky
Subject: Re: The Blue and Gold
Date: 13 Oct 2019 19:02:13
Message: <5da374b5@news.povray.org>
On 2019-10-10 2:33 PM (-4), Alain Martel wrote:
> Le 2019-10-09 à 20:55, Cousin Ricky a écrit :
>>
>> This was a 3-pass render:
>>
>>    1. A photons pass with no trees on the hills.  For some reason, the
>>       shooting of photons stalls when the trees are included, though I
>>       cannot see how the trees would interfere with the process.  It is
>>       only a small section of the checkered plane that receives
>>       photons.  ("Either be patient or do not shoot photons at infinite
>>       objects." --Reference Manual)
>>
>>       Photon mapping was also faulty with the scene as-is, but when I
>>       inserted a patio into the scene, the photons were perfect.  I
>>       couldn't figure out why that is.  The patio was removed for the
>>       final render.
>> [snip]
> 
> For those trees and photons : You can set the trees so that they don't 
> receive any photons with : photons{collect off}
> 
> You can replace the trees with some place holder in the initial phases.
> 
> Even for the final pass, it may be possible to use a «billboard» that 
> show the trees.

This was the setup for the photons pass render: a texture used as a 
place holder for the trees, and no radiosity.  Also, the actual run was 
smaller and without AA, but I would not inflict that image on you.

   Number of photons shot: 159843404
   Surface photons stored:  27846963
   Gather function called:     67275

The trees (and the patio, for that matter) came from an include file, 
and it would have been difficult or impossible to set collect off on 
them.  But again, the interference just didn't seem to make sense.  The 
photon count just stalled forever at a few thousand (in contrast to the 
millions in the successful render), and few if any photons would have 
hit the trees anyway.

There is a bit of caustics on the patio wall, but it didn't show up in 
the final render.


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