Op 17/08/2020 om 19:11 schreef MichaelJF:
> Am 17.08.2020 um 08:45 schrieb Thomas de Groot:
>> Op 16/08/2020 om 18:27 schreef Bald Eagle:
>>> MichaelJF <mi-### [at] t-onlinede> wrote:
>>>> I failed to
>>>> model this thin slice of white in the reflections in the original
>>>> photography so far. But I think to "forget" it, is a venial sin.
>>>
>>> Maybe you can add a cylinder of media that is bisected by the water's 
>>> surface?
>>> Or layer an AOI texture onto the water?
>>>
>>> Other than that, I'd look to prior art in the archives, or in other 
>>> graphics
>>> groups...
>>>

>>>
>>>
>>>
>>
>> Great job indeed. First thing I thought concerning this issue was: Tom 
>> York's diffuse modulation. Maybe it can help you: see his comment in 
>> the following thread:
>>
>>
http://news.povray.org/povray.newusers/thread/%3Cweb.4393311ed86e519e4114da700@news.povray.org%3E/?ttop=338362&toff=650

>>
>>
> Thank you both for your suggestions. May be the addition of an other 
> media may cure the problem but I had a lot of difficulties to adjust the 
> media as they are so far and will not risk to disturb them by another 
> one. The other approach proposed by Thomas is the use of a texture_map 
> to the lake similiar to the construction of my sky_sphere. Fortunatelly 
> air has no ripples or waves and is more predictable as water. May be I 
> must have more patience in modellng a filtering disc with a proper 
> scaled hole
> 
> disc {





> }
> 
> Best regards
> Michael
> 

Best approach I guess is the one made by Jaime Vives Piqueres. I have 
been working with his code lately for a couple of months (adding foam to 
sea water for instance; see my 'Nature Beyond' thread).

See the following link for the technical aspects:

http://www.ignorancia.org/index.php/galleries/old-images/sea-buoy/

-- 
Thomas

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