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From: Darren New
Subject: Re: Amazonas
Date: 18 May 2010 11:51:30
Message: <4bf2b782$1@news.povray.org>
Jaime Vives Piqueres wrote:
>   Thanks, also for the reference pic, as it served to polish some details,
> including some of the ones you mention later.

Nice. I liked the other trees better. These look like those tufts of foam or 
moss you get for making model railroad tracks. The previous version had 
fronds and branches visible, and even some trunks.

-- 
Darren New, San Diego CA, USA (PST)
    Ada - the programming language trying to avoid
    you literally shooting yourself in the foot.


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From: nemesis
Subject: Re: Amazonas
Date: 18 May 2010 16:29:10
Message: <4bf2f896$1@news.povray.org>
Darren New escreveu:
> Jaime Vives Piqueres wrote:
>>   Thanks, also for the reference pic, as it served to polish some 
>> details,
>> including some of the ones you mention later.
> 
> Nice. I liked the other trees better. These look like those tufts of 
> foam or moss you get for making model railroad tracks. The previous 
> version had fronds and branches visible, and even some trunks.

I agree, but perhaps it's because they were a bit further away?  Also, 
in the original there seems there were a few palm trees scattered.

I did enjoy the variation in color and size, though.  And in the light 
reflection in the river. :)

-- 
a game sig: http://tinyurl.com/d3rxz9


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From: Darren New
Subject: Re: Amazonas
Date: 18 May 2010 16:46:49
Message: <4bf2fcb9@news.povray.org>
nemesis wrote:
> I agree, but perhaps it's because they were a bit further away?  Also, 
> in the original there seems there were a few palm trees scattered.

Indeed. The bits of details give the reality. :-)

> I did enjoy the variation in color and size, though.  And in the light 
> reflection in the river. :)

Oh, yes. The only complaint was the consistency of folliage.

-- 
Darren New, San Diego CA, USA (PST)
    Ada - the programming language trying to avoid
    you literally shooting yourself in the foot.


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From: nemesis
Subject: Re: Amazonas
Date: 18 May 2010 19:02:03
Message: <4bf31c6b$1@news.povray.org>
Darren New <dne### [at] sanrrcom> wrote:
 > nemesis wrote:
 > > I agree, but perhaps it's because they were a bit further away?  Also,
 > > in the original there seems there were a few palm trees scattered.
 >
 > Indeed. The bits of details give the reality. :-)

Sometimes it doesn't even need so much detail.  Here's something I 
hacked away today in Blender inspired by Jaime.

http://blenderartists.org/forum/showthread.php?p=1628561#post1628561

no leafs, just some blob-like object with some "cloud bump mapping" on...

hope Sam gets inspired too... :)

-- 
a game sig: http://tinyurl.com/d3rxz9


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From: Kenneth
Subject: Re: Amazonas
Date: 18 May 2010 22:15:00
Message: <web.4bf3490c9c4c180cae92d9930@news.povray.org>
Jaime Vives Piqueres <jai### [at] ignoranciaorg> wrote:
> Hi All:
>
>     Google image search is becoming my first source for unexpected
> inspiration... as usual, I was searching for something else, when found a
> nice aerial pic of the Amazon river.
>
>     Here are some details about this "quick hack":

Sorry to be so late in replying to your wonderful images; when I was looking
through the 'image digest' days ago, I thought someone had simply posted a
reference photograph of the Amazon! I didn't think of looking more closely 'til
now... :-(  How embarrassing...

Beautiful!  And thanks for posting all the nice how-to details.

Ken


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From: Thomas de Groot
Subject: Re: Amazonas
Date: 19 May 2010 03:02:50
Message: <4bf38d1a$1@news.povray.org>
Sorry, no. I think the first image was much better. The color variation of 
the canopy looks artificial here (only two colors? or so it appears) and the 
mist/cloud is a bit too stiff/heavy.

Thomas


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From: Thomas de Groot
Subject: Re: Amazonas
Date: 19 May 2010 03:21:51
Message: <4bf3918f$1@news.povray.org>
"Jaime Vives Piqueres" <jai### [at] ignoranciaorg> schreef in bericht 
news:4bf28f4b@news.povray.org...
>   Indeed you could use this technique for that... it's very easy, 
> specially
> if you are already using a heighfield for the ground. Make a copy of the
> grayscale map, and paint black the zones where you don't want grass, and
> white for the rest. Then declare a pigment function of it:
>

...and using red, green, and/or blue you can add even more distribution 
possibilities; or using the greyscale intensity of course. As this, in the 
end, may need much parse time, it is efficient to save the values (position, 
distribution type, etc) to file and read them separately. I used that 
technique for the vegetation of my TC-RTC entries: 
http://www.tc-rtc.co.uk/imagenewdisplay/stills/index118.html and 
http://www.tc-rtc.co.uk/imagenewdisplay/stills/index153.html

Thomas


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From: clipka
Subject: Re: Amazonas
Date: 19 May 2010 03:25:00
Message: <4bf3924c$1@news.povray.org>
Am 18.05.2010 13:11, schrieb Jaime Vives Piqueres:

> For the color variation I used directly colors picked from the pic you
> linked, but they don't look so natural... perhaps because the sunlight
> color
> is somewhat yellowish.

... or perhaps because you didn't gamma-adjust the colors you picked?

Note that image manipulation programs usually give you 
gamma-precorrected colors, while if you follow best practices you will 
need linear colors in POV-Ray, i.e. you'll usually want to use e.g.

   color rgb <pow(R/255, 2.2), pow(G/255, 2.2), pow(B/255, 2.2)>


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From: "Jérôme M. Berger"
Subject: Re: Amazonas
Date: 19 May 2010 17:09:06
Message: <4bf45372$1@news.povray.org>
Thomas de Groot wrote:
> Sorry, no. I think the first image was much better. The color variation
 of 
> the canopy looks artificial here (only two colors? or so it appears) an
d the 
> mist/cloud is a bit too stiff/heavy.
> 
	Plus, the light reflecting off the river looks wrong to me...

		Jerome
-- 
mailto:jeb### [at] freefr
http://jeberger.free.fr
Jabber: jeb### [at] jabberfr


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From: Sven Littkowski
Subject: Re: Amazonas
Date: 21 May 2010 15:19:59
Message: <4bf6dcdf$1@news.povray.org>
Wow!


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