POV-Ray : Newsgroups : povray.newusers : Media density : Re: Media density Server Time
28 Apr 2024 22:27:27 EDT (-0400)
  Re: Media density  
From: Stephen
Date: 25 Jul 2016 05:35:34
Message: <5795dd66$1@news.povray.org>
On 7/25/2016 9:56 AM, clipka wrote:
> Am 25.07.2016 um 10:32 schrieb Stephen:
>> On 7/25/2016 8:21 AM, Thomas de Groot wrote:
>>> On 25-7-2016 8:57, Thomas de Groot wrote:
>>>> On 24-7-2016 18:09, clipka wrote:
>>>>> Am 24.07.2016 um 12:50 schrieb Thomas de Groot:
>>>>>
>>>>>> Also be aware that in a density pattern colours are
>>>>>> interpreted as grey tints.
>>>>>
>>>>> Actually, no, they're not. They do modify the media's effective colour.
>>>>>
>>>>
>>>> Yes, but are the 'colours' used /inside/ the density statements not read
>>>> as grey tints? That is what I have understood (which doesn't mean
>>>> anything of course). ;-)
>>>
>>> I looked that up and was put back right on my feet again. I must have an
>>> alternate universe documentation file in my head... :-)
>>
>> That's what I thought. That it averaged the colour values.
>> Where about in the documentation. Do you have a reference?
>
> It is neither a grey value, nor a plain average.
>

And it is?
...

> I suspect your misconceptions may have their roots somewhere in the fact
> that there are two knobs available to introduce colour to media: The
> `emission`, `scattering` or `absorption` statement, respectively, and
> the `density` statement.
>

I'm thinking of the value that the `density` statement passes to the 
media statement. Which it gets from the df3 file.


-- 

Regards
     Stephen


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