Hi Simon,

Do you have the 'hollow' keyword in your object? You don't mention it in
your posts, so it may have slipped your mind.

Use as

object {
	My_Object
	texture { ... }
	interior { ... }
	hollow
}

Also, to speed up tests I usually have a fast approximation set up, such
as

media {
	#if (Test)
		intervals 1
		samples 3,3
		absorption 1
		emission 1
	#else
		intervals 3
		samples 5,5
		scattering { 2, rgb 1 extinction 1 }
	#end
	density { ... }
}

then set Test to true for a fast test or false for a propper render.

I don't usually use scattering as well as absorption/emission in one
media, though you can for certain effects.

Bye for now,
	Mike Andrews.

Simon Lemieux wrote:
> 
> > I assume you want the halo effect seen around light sources in fog...
> > You need to use one of the scattering functions other than isotropic.
> > Mie hazy and Mie murky(types 2 and 3) should work well. Rayleigh(4)
> > might work under some circumstances, Heyney-Greenstein(5) could give you
> > more control over the size of the "halo".
> 
> Here, I've tried the code below, but it doesn't give me anything, my object is
> plain transparent and we can see some darkened outline, but that looks more like
> a bug since the object is pigment {rgbf 1}...
> 
> texture {
>   pigment { color rgbf 1 }
> }
> interior {
>   media {
>     absorption 1
>     emission 1
>     scattering { 2, rgb 1 extinction 1 }
>   }
> }
> 
> Is there any global_settings I need to turn on to see a cloud? Is there
> something I'm missing?
> 
> Thanks,
>         Simon

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