On Mon, 28 Mar 2011 08:58:26 +0200, Thomas de Groot  
<tDOTdegroot@interdotnlanotherdotnet> wrote:

>
> "Nekar Xenos" <nek### [at] gmailcom> schreef in bericht
> news:op.vs0ao1i0ufxv4h@xena...
>> I'm sure this will be corrected if you remove the spherical media at the
>> lights and use the method I described earlier in conjunction with
>> spotlights.
>
> And get better halos? Remind me where you described this, I seem to have
> forgotten... :-(
>
> Thomas
>
>

I played a bit with media1.pov to get the effect:

///////////////begin code////////////////////////

//	Persistence of Vision Raytracer Scene Description File
//	File: media1.pov
//	Author:
//	Description:
// Participating media environment with spotlights.
//
// -w320 -h240
// -w800 -h600 +a0.3
//
//*******************************************

#version 3.6;
global_settings {assumed_gamma 1.0}

//
// The camera.
//

camera {
   location <10, 6, -20>
   direction <0, 0, 1.5>
   look_at <0, 4, 0>
}

//
// Add media.
//

media {
   scattering { 1, rgb 0.03}
   intervals 1
   samples 5
   method 3
}

//
// Light source not interacting with the atmosphere.
//
/*
light_source { <0, 15, 0> color rgb 0.7
   media_interaction off
   shadowless
}    */

//
// Spotlight
//

#declare Intensity = 2;


light_source {
   <0, 9, -5> color rgb 2
   spotlight
   point_at <0, 5, 0>
   radius 45
   falloff 60
   tightness 1
   fade_distance 5
   fade_power 2
   media_attenuation on
}
//
// Room.
//

box { <-20, 0, -20>, <20, 20, 20>
   pigment { rgb 1 }
   finish { ambient 0.2 diffuse 0.5 }
   hollow
}

//////////End code///////////////////


-- 
-Nekar Xenos-

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