Alain Martel <kua### [at] videotronca> wrote:

> > What I always find difficult to emulate is the light combined with the
> > texture/transparency of the leaves. I have your technique about the
> > leaves (faked translucency mapping) and also use double_illuminate. It
> > is the atmospheric media which is often difficult to do. Isotropy is
> > fairly straightforward, but I often prefer the use of Henyey-Greenstein
> > scattering withou too extreme eccentricity.
> >
>
> Instead of double_illuminate, you should us the back side illumination.
> Starting with version 3.7, it's done by using two values after diffuse.
> It gives you much more control.
> Example : diffuse 0.6 0.3
> Just remember that the two values should add to less than 1.
>
> If you use double_illuminate with a diffuse value of 0.6, what you
> effectively get is this : diffuse 0.6 0.6
> This is not realistic at all.
>
> You can also add some filter to the pigment. Keep that pretty low.



I wasn't aware of this - many thanks, Alain!

Norbert

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