Op 19/11/2020 om 19:40 schreef Alain Martel:

>> 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.
> 

Of course! and that is what I meant: I use backside illumination in my 
scenes, and misspelled it into double_illuminate here... ;-/

-- 
Thomas

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