> Am 14.07.2012 14:12, schrieb Thomas de Groot:
>> OK. Got the transparency solved. Just a stupid max_trace_level issue :-(
>>
>> Next problem is to get rid of this sphere edge seen in cross section...
>
> ... and here your real problems begin. You'll need to somehow mimic an
> ior gradient.

Ugly cludge that can simulate an ior gradient:
Use many shells of decreasing thickness each varying in ior by a small 
amount in the order of 0.002 or less.
The outer shell have an ior in the order of 1.001 or maybe even less, 
then each other have a slightly larger ior.
Each thinner shells must reside inside any previous ones. No merge as 
you need all those internal surfaces.


Big increase in rendering time and needs a large max_trace_level.



Alain

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