Op 1-11-2021 om 12:26 schreef Kenneth:
> Thomas de Groot <tho### [at] degrootorg> wrote:
>>
>> I am not yet sure about those 'media voids'... I shall have to think about that.
> 
> Yeah, I probably spoke too soon-- such voids would not produce the same visual
> effect as your own method of creating voids with actual geometry.

Correct. I am struggling with the concept however, if I would add a 
separate media to the voids (even tiny ones). The scene file I consulted 
as an example is from Glenn McCarter's Plumbing suite (2003): 
http://www.irtc.org/stills/2003-06-30.html (3rd Place) and he happily 
does mix them, but I am not really sure he is doing things correctly, 
especially now with newer pov versions.

>>
>> The only media used here
>> is an absorbing media which takes care of it all (with the ior too of
>> course). I experimented with the scattering media in addition to the
>> absorbing one, because Jaime did something like that in his crystal
>> experiments.
>>
>> http://www.ignorancia.org/index.php/galleries/latest-images/crystals-and-mushrooms/
>>
>> However, I did not find it to work as expected.
>>
> 
> Also, it occurred to me that any fractures or cleavage planes in a crystal would
> need to have some partial reflectivity (if I understand the concept of such
> planes). Thin slices of interior media certainly cannot do that. :-(
> 
Yes, there is that too. Still, I want to experiment with it to see what 
would happen.

> BTW, thanks for the link to Jaime's crystals; I will take a look at his examples
> and code.
> 
> 
Jaime's work is often a treasure trove indeed.

-- 
Thomas

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