POV-Ray : Newsgroups : povray.binaries.images : Rainbow... Server Time
1 Aug 2024 08:19:08 EDT (-0400)
  Rainbow... (Message 1 to 5 of 5)  
From: Trevor G Quayle
Subject: Rainbow...
Date: 27 Nov 2008 10:20:01
Message: <web.492eba0f4cea9e2d81c811d20@news.povray.org>
A simple doodle that I've been playing with the past couple days.

-tgq


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rain.jpg


 

From: nemesis
Subject: Re: Rainbow...
Date: 27 Nov 2008 12:18:20
Message: <492ed65c@news.povray.org>
Trevor G Quayle escreveu:
> A simple doodle that I've been playing with the past couple days.

ha!  Incidentaly, I've done in the past a similar image.  I was trying 
to get it to look like with Mental Ray's dielectric shader:

http://en.wikipedia.org/wiki/Dielectric_Shader

I think it's hard to get colors like that.


code:


/**
  * mental ray can, so can povray
**/



#local GI = no;
#local CAUSTICS = on;
#local SOFTSHADOWS = on;
#local BLUR = 30;

background { rgb 0 }

#macro reflmat( fdcol )
	/*texture {
		pigment { rgbt fdcol + <0,0,0,.96> }
		finish {
		    diffuse .0 ambient .0 brilliance 1.1 metallic 1
		}
	}*/
	texture {
		//pigment { rgbt <1,1,1,.97> }
		pigment { rgbft fdcol + <0,0,0,.3,.68> }
		finish {
		    diffuse 20 ambient .0 brilliance 3 metallic 1
		    reflection { .05,.98 metallic 0 fresnel on
			exponent 2 }
			conserve_energy
		}
	}
         hollow
         interior { ior 1.5 //fade_power 2 fade_distance .2
		fade_color fdcol*1
             //media { scattering { 1, fdcol/10 extinction 1 } }
             media { absorption (1-fdcol)*.16 samples 5 }
             media { emission .3*fdcol }
         }
         photons { target on refraction on collect off }
#end


// cena
union {
     // chao
     plane { y, 0 pigment { rgb 1 } finish { ambient .06 diffuse .6 }
         photons { target off refraction on collect on }
     }
     // as duas semi-roscas:  red (x) e blue (z)
     union {
         torus { 1.2,.16 reflmat( z ) rotate x*90 translate -y*.0 + x/3 }
         torus { 2,.2 reflmat( x ) rotate x*90+y*90 translate -y*.4 }
         translate -y/2
     }

     light_source { 7*y 1.5
         #if (SOFTSHADOWS)
         //spotlight point_at 0
         area_light 1.4*x,1.4*z,5,5 jitter adaptive .001
         #end
         photons { refraction on area_light }
     }

     box { -1,1 scale y*2 translate y*5 no_image no_shadow
	pigment { rgb 1 } finish { ambient 2 diffuse 1 } }

     rotate -y*30
     rotate -x*30
     translate z*6+y/5
}

camera { angle 30 #if (BLUR) focal_point 0 aperture .002 blur_samples 
BLUR #end }

global_settings {
     max_trace_level 60
     #if (GI)
     ambient_light .002
     radiosity {
         brightness 1.6
         count 60
         error_bound .5
         gray_threshold .7
     }
     #end

     #if (CAUSTICS)
     photons { /*spacing .1*/ count 500000 }
     #end
}


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Download 'desafio-mental-dieletric-le_doublot-wip4.png' (302 KB)

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desafio-mental-dieletric-le_doublot-wip4.png


 

From: William Tracy
Subject: Re: Rainbow...
Date: 27 Nov 2008 23:03:02
Message: <492f6d76@news.povray.org>
I love the concept, and the way that the loops are offset from each other.

Still, it feels like it needs something to make it brighter and give it 
a little more life--maybe stronger phong?

-- 
William Tracy
afi### [at] gmailcom -- wtr### [at] calpolyedu

I disapprove of what you say, but I will defend to the death your right 
to say it.
     -- Evelyn Beatrice Hall, frequently mis-attributed to Voltaire


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From: Trevor G Quayle
Subject: Re: Rainbow...
Date: 28 Nov 2008 12:30:00
Message: <web.49302a15d3e0b85381c811d20@news.povray.org>
William Tracy <wtr### [at] calpolyedu> wrote:
> I love the concept, and the way that the loops are offset from each other.
>
> Still, it feels like it needs something to make it brighter and give it
> a little more life--maybe stronger phong?
>
> --
> William Tracy
> afi### [at] gmailcom -- wtr### [at] calpolyedu
>
> I disapprove of what you say, but I will defend to the death your right
> to say it.
>      -- Evelyn Beatrice Hall, frequently mis-attributed to Voltaire

No phong included.  All reflections and lighting are natural.
The problem with the feel of it is that my envirnment/lighting is very boring.
Basically it's in a full sun exposure situation so it only has one bright
point-like light plus ambient, likewise for the reflection, so there isn't much
interesting detail.

Here is a version with a different environment/lighting scheme.  Do you think
this has a little more life?

-tgq


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rain2.jpg


 

From: William Tracy
Subject: Re: Rainbow...
Date: 28 Nov 2008 16:19:01
Message: <49306045@news.povray.org>
Trevor G Quayle wrote:
> Here is a version with a different environment/lighting scheme.  Do you think
> this has a little more life?

Now *that's* an improvement.

Now it just needs a little anti-aliasing. :-)

-- 
William Tracy
afi### [at] gmailcom -- wtr### [at] calpolyedu

I disapprove of what you say, but I will defend to the death your right 
to say it.
     -- Evelyn Beatrice Hall, frequently mis-attributed to Voltaire


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