hi,

clipka <ano### [at] anonymousorg> wrote:
> Am 09.09.2018 um 18:50 schrieb jr:
> > ... like very, very thin mother-of-pearl.
>
> Then - presuming your torus thingumajig is using non-solid geometry -

"my" torus.  lol.  I would not be able to create anything like it -- if my life
depended on it.

> you want backside diffuse illumination, and maybe one or two more levels
> of radiosity recursion.
> To enable backside diffuse illumination, use the two-parameter version
> of `diffuse`:
>     finish { diffuse FRONT,BACK }
> where FRONT is how much light is reflected to the illuminated side, and
> BACK is how much light is transmittend to the other side. The sum should
> be smaller than than 1.0 for realistic materials.

only had one quick try so far (got a bit paranoid last night when the CPU temp



Alain <kua### [at] videotronca> wrote:
> For mother-of-pearl, you also need a fair amount of iridescence. Maybe
> something in the 0.4 .. 0.6 range.

thanks.  I'll add this "into the mix" next run.


regards, jr.

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