Am 19.08.2020 um 08:38 schrieb Thomas de Groot:
> Op 18/08/2020 om 20:17 schreef MichaelJF:
>> Am 18.08.2020 um 09:15 schrieb Thomas de Groot:
>>> 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/
>>>
>> Hello Thomas,
>>
>> you did a very good job in adding foam to Jaime's sea and added a very 
>> nice whale. First I tried an isosurface similiar to Jaime's approach 
>> but I decided against it since it looked to much like sea with storms 
>> and tides and so on and not like a quiet lake.
>>
> 
> I am beginning to wonder if I understand your problem correctly. It is 
> the reflection of the Sun's disk on the water surface, isn't it? If so, 
> this is solved very nicely imo by the finish block of the water and the 
> finish block only. Jaime uses the following code for his (sea) water 
> surface:
> 











> 
> The use of this results in the image attached. My earlier suggestion 
> about Tom York's diffuse modulation works well on opaque surfaces. I 
> realise now that it would be difficult to implement correctly on a water 
> surface.
> 
> I am sorry if I confused you with information not entirely up to the point.
> 
Hi Thomas,
if you look at the photography from the wikipedia you will notice a very 
small area of white reflections from the sun from the horizon to the 
middle of the reflections at the sea. But I overlooked that in my image 
I have a very different angle (sun and camera are at a very lower level) 
between sun and camera. If I lift the camera in this scene from y=1 to 
y=10 POV displayed the white reflections at the sea. In my setting they 
coinside to happen at the land area. Sorry that I led you on a wrong 
track. But many thanks anyway.

Best regards
Michael

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