On 17/02/2011 2:09 AM, Alain wrote:

>
> Nice one.
>

Thanks.

> It absolutely begs for area_light with area_illumination. You have 2
> choices: one area_light with circular orient the same dimention as that
> of the globe, or two area_lights, one small in the center, or slightly
> off center, representing the light bulb, and a second one as broad as
> the globe.
>
> For the globe, you can try using back side illumination. Just add a
> second component after the diffuse component.
>

I'll wait until I can get my head around projected_through and 
looks_like but they are good ideas.

> A trick that I did'nt try but may be interesting: Use inside_texture.
> Have the normal texture be totaly transparent and the interior texture
> with the texture you use now, keeping only the diffuse and ambient
> components of the finish. Any specular or phong highlight is to be
> applyed to the exterior texture, as well as reflections, if any.
>

Again, worth trying.

> In your test using projected_through, it looks like the light_source is
> not at the center of the globe but some distance under it.

It does doesn't it but the light is at the centre of the spheres that 
make up the globe. Although the difference is below the the spheres.
> It's possible that the code for projected_through is not designed for an
> object that surrounds the light and breaks down in that situation.
>

I'm going to spend some time experimenting.


-- 
Regards
     Stephen

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