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18 Nov 2024 14:27:25 EST (-0500)
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From: helge h
Subject: electron microscope-like effect (152 k)
Date: 1 Aug 2005 16:30:01
Message: <web.42ee8574fa1babc58072d1170@news.povray.org>
Just a quick test of an idea I had on how to make this effect in POV-Ray; by
placing a number of lights evenly around in a circle;

#local N = 12; // number of lights
#local I = 0;
#while (I < N)
 light_source {
  <0, 500, 50> // (note the z distance)
  color <1, 1, 1> * 7.5 / N // adjust strength
  parallel
  point_at <0, 0, 0>
  shadowless
  rotate z * I * 360 / N
 }
 #local I = I + 1;
#end

Black background, and black fog to give more illusion of distance.

H


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Attachments:
Download 'elmicro.jpg' (149 KB)

Preview of image 'elmicro.jpg'
elmicro.jpg


 

From: Orchid XP v2
Subject: Re: electron microscope-like effect (152 k)
Date: 1 Aug 2005 16:48:41
Message: <42ee8aa9$1@news.povray.org>
Neat! I always wondered if POV-Ray could do this... OK, I gotta try that!


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From: HenryW
Subject: Re: electron microscope-like effect (152 k)
Date: 1 Aug 2005 18:15:00
Message: <web.42ee9e8bbadb9964969ed7910@news.povray.org>
Wild!

What kind of texture are you using?

Henry Wagner
http://www.henrywagner.org/povray/images/


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From: helge h
Subject: Re: electron microscope-like effect (152 k)
Date: 1 Aug 2005 18:25:01
Message: <web.42eea070badb99648072d1170@news.povray.org>
"HenryW" <pov### [at] henrywagnerorg> wrote:
> Wild!
>
> What kind of texture are you using?
>

#local Surface = texture {
 pigment { color rgb <0.804, 0.82, 0.85> }
 normal { agate scale 0.1 }
 finish { ambient 0 diffuse 1 }
}

It's the normal that gives the effect. The main spheres on the objects have
a radius of 1.0.

H


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From: Mark Birch
Subject: Re: electron microscope-like effect (152 k)
Date: 1 Aug 2005 18:40:00
Message: <web.42eea497badb99644daddc090@news.povray.org>
Very nodulistic!

It looks like you could achieve the same effect with no lights & an ambient
AOI pattern...

Mark.


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From: helge h
Subject: Re: electron microscope-like effect (152 k)
Date: 1 Aug 2005 19:45:00
Message: <web.42eeb2febadb99648072d1170@news.povray.org>
"Mark Birch" <las### [at] hotmailcom> wrote:
> Very nodulistic!
>
> It looks like you could achieve the same effect with no lights & an ambient
> AOI pattern...
>
> Mark.

Explain please.

H


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From: Zeger Knaepen
Subject: Re: electron microscope-like effect (152 k)
Date: 1 Aug 2005 20:01:14
Message: <42eeb7ca@news.povray.org>
"helge_h" <nomail@nomail> schreef in bericht
news:web.42eeb2febadb99648072d1170@news.povray.org...
> "Mark Birch" <las### [at] hotmailcom> wrote:
> > Very nodulistic!
> >
> > It looks like you could achieve the same effect with no lights & an
ambient
> > AOI pattern...
> >
> > Mark.
>
> Explain please.

I was going to suggest the same thing Mark did.

you need no light, you only need a texture like this one:
texture {
    pigment {
        aoi
        color_map {[0 rgb 0][.5 rgb <0.804, 0.82, 0.85>]}
    }
    normal { agate scale 0.1 }
    finish { ambient 1 diffuse 0 }
}

You need MegaPov for the aoi-pattern though.

cu!
-- 
ZK AKA Gaeriel
http://www.povplace.com
"Begin the unnecessarily slow-moving dipping mechanism!"


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From: Bob Hughes
Subject: Re: electron microscope-like effect (152 k)
Date: 1 Aug 2005 20:14:14
Message: <42eebad6$1@news.povray.org>
Creative usage of shadowless lights. Makes me think of nanobots.

I went looking for intersecting parts in there, because I knew if you didn't 
use collision avoidance that I'd see a lot of that, and was about to think 
there weren't any such places; then happened to notice the center. Just a 
little to the left of exact center. I was looking around the sides and into 
the background first.

Anyway, it's a very eye-catching image!

Bob


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From: zorglub
Subject: The Dark Side
Date: 2 Aug 2005 08:38:27
Message: <42ef6943@news.povray.org>
A different approach :

Only one point_light with a negative color at camera position, and an 
ambient texture.

camera {
   location  <0.0, 0, -10.0>
   direction 1.5*z
   right     x*image_width/image_height
   look_at   <0.0, 0.0,  0.0>
}
light_source {
   <0, 0, -15> // same as cam, to eliminate the side/parallax effect
   color rgb -2 // megative value for dark side, greater than 1 for good 
contrast ;)
   shadowless
}
// the excellent texture, slightly modified
#local Surface = texture {
  pigment { color rgb <0.804, 0.82, 0.85> }
  normal { agate scale 0.1 }
  finish { ambient 2 diffuse 1 }  // ambient greater than 1 for good 
contrast
}


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Attachments:
Download 'electronic.jpg' (76 KB)

Preview of image 'electronic.jpg'
electronic.jpg


 

From: Marneus Calgar
Subject: Re: electron microscope-like effect (152 k)
Date: 2 Aug 2005 08:44:09
Message: <42ef6a99$1@news.povray.org>
Great !!!!!

-- 
Dark Skull Software
http://www.darkskull.net

A+


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