> The IOR for your gem may be to low, ruby's ior is higher than glass, 
> close to 2 I think.

Ruby = 1.7 according to the reference I saw - which happens to be what 
I'm using, by total fluke ;-)

> Did you set the fade_distance and fade_power?

Don't even know what those do without checking the manual... LOL!

> Do you use media_atenuation? Sould be on.

Ditto.

> Now, it look like only the surfaces have any colour.

True.

> This look like a midle-ages kind of cut, no faceting on the under side, 
> very box like (the had still to develop the needed skils and tools).

...guess whic POV-Ray primitive I used to make it? ;-)

But yes, it seems I need more cuts. Pitty - they are really hard to do. :-S

> Did you set the metal as a target for the photons?

Yup. Target on, collect off, reflection on, refraction off.

> It may be "good enough" as is if it's going to be small in the final 
> scene.

No - it's going to BE the entire scene. Or that's the plan...

Anyway, thanks for the tips...

Andrew @ home.

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