> I think we both mean the same thing :-)
>
> As there is a lamp shade, I did not use a spotlight but simple point/area
> lights within a scattering media. However, in both cases, the halo effect is
> not really there like in the original, which is the reason for my emissive
> media around the light source.
> ...
> Thomas
>
>

What I would do, is to use a somewhat larger area_light using 
are_illumination. If using a looks_like, make the area_light about 
double to tripple the extent of that object.
Then, place it a little bit lower than where it should be.
The fade_distance would be shorter than the dimention of the light, on 
par with the non-enlarged area_light.

If needed, I may also add another, weak, light slightly in front of the 
reflector, possibly with a fade_power 3 or 4.

Using radiosity won't help as radiosity can be affected by your media, 
but can never illuminate any media.

It may possibly be simulated using a small, hollow, transparent, 
no_image, no_shadow, and partly reflective sphere, or maybe a disk, some 
distance before the lamp and use photons to reflect some light into the 
media.


We need something between scattering media and SSLT for such cases when 
you have some multiple scattering. It will probably be very slow...



Alain

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