RusHHouR nous apporta ses lumieres en ce 01-01-2007 05:34:
> Hi!

> Im doing a dark alleyway scene, and im experimenting with media a bit...

> http://img132.imageshack.us/img132/4606/alley2ru4.jpg


> want these "clouds" that appear, probably as a result of the density
> thing..

> If you got any tips, please help me.
> /rush


> ----------the media code-----------
> media {    // atmospheric media sample
>   intervals 10   //10
>   scattering { 1, 0.05 extinction 0.5  }
>   density {
>         bumps
>         frequency 2            // <- add this line
>     color_map {
>       [0.00 color Gray20]
>       [0.50 color Gray40]
>       [1.00 color Gray20]
>     }
> }
>   samples 1, 10
>   confidence 0.9999
>   variance 1/1000
>   ratio 0.9 //0.9
> }




One thing that you can do, is to contain your media in some container. In your 
case, a cone with the sumit slightly over the light and a bit larger than the 
light's cone would probably do nice.
As a side bonus, it would render faster as the media will now only be computed 
where it's visible.
cone{<0,10,0>,0,0,Light_radius+0.1//adjust dimentions and translate as needed
	pigment{rgbt 1}//perfectly transparent
	hollow//so it can contain the media. It's the only use of that keyword.
	interior{Your_media}
	}

-- 
Alain
-------------------------------------------------
If you're ever about to be mugged by a couple of clowns, don't hesitate - go for 
the juggler.

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