>
> finish {
> ambient 0
> diffuse 1

Try diffuse 0, or some smallish value.

> brilliance 0.05

Extremely low value! Your surface reaction to illumination is almost 
independent from the direction of the incident light. Such a value is 
rather unexpected for a shiny, reflective surface.
I'm partial of using larger value, at least 1, probably more.

> specular 0.5
> roughness 0.001
> reflection 0.125
> }

For your material, I'd use some variable reflection with fresnel and 
conserve_energy, but, here it's mostly a test.
Suggestion: reflection{0.05, 0.25 fresnel} conserve_energy

>
>
> interior {
> fade_distance 2
> fade_power 3 // maybe this?

This should be fade_power 1 OR fade_power 1001.
fade_power 3 is totaly unrealistic in the real world. It may be used to 
simulate a light_source glowing through some medium that restricts it's 
propagation, like in some underwater scene.
The realistic values are:
interior: fade_power 1 OR fade_power 1001
light_source: fade_power 2

> ior 1.45
> caustics 1.0
remove this if you use photons.

> }
>
> Actually the bluish look of the background comes from the glows, as it
> is really black and the ground white.
>
> Weird stuff.
>
> Ian
>

You don't define fade_color, so it defaults to black.

Finaly, it looks like your sphere is reflecting your glow colour.




Alain

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