On 23-9-2017 10:58, clipka wrote:
> Am 23.09.2017 um 08:44 schrieb Thomas de Groot:
> 
>>>> I haven't played around much with scattering media's various types
>>>> (usually
>>>> using just type 1.) But I've noticed an additional haze effect in
>>>> real life that
>>>> can't(?) be easiily reproduced, if at all: In a rain-type misty
>>>> atmosphere (not
>>>> actual raindrops, but *heavy* mist), distant light sources like
>>>> streetlights
>>>> look slightly *blurred.* I don't know what the physical reason for
>>>> this is
>>>> (probably a complex phenomenon involving multitudes of different IORs
>>>> of the
>>>> tiny misty 'drops'), but its an effect that would add a bit more
>>>> realism to a
>>>> hazy scene. I have no idea if any other raytracing renderer can do this.
>>>
>>> That effect is caused by anisotropic scattering, with rays mostly
>>> scattered in a direction close to the original direction.
>>>
>>> And yes, POV-Ray should be able to do it.
>>
>> "should be able" meaning that it cannot do that yet, I suppose?
> 
> No, more like meaning that I've never tested it myself.
> 

Aha! That is an interesting notion... :-) So mie haze or mie murky 
should do the trick. Something to look into... one day.

-- 
Thomas

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