Re: [HACKERS] PostgreSQL LOGO (was: Developers Globe (FINAL))

On Tue, 23 Mar 1999, you wrote:

>    Outch  -  yes I know what you mean - I have such a one for my
>    camera too (along with the other usual ones like the  2  diop
>    hole  lense  etc.).  That's  one  of the limits of raytracing
>    AFAIK. I never had any success on such a thing like a filter.
>    Also  it's  impossible  to  build  spectral effects. Spectral
>    effects are based on the fact that the refractional index  of
>    a  material varies on the frequency of the light (that's what
>    makes the fire in diamonds). But a raytracer cannot do this -
>    or  at  least  the  trace would run infinitely long - thus no
>    tracer I know of supports it.

Doesn't blender do spectral effects?

Taral