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On 20-1-2019 17:36, Bald Eagle wrote:
> Thomas de Groot <tho### [at] degrootorg> wrote:
>> On 20-1-2019 9:33, ingo wrote:
>
>
>>> .gray and .hf = 0.3 * red + 0.59 * green + 0.11 * blue, so yes there's
>>> quite a difference to be expected.
>>>
>>> ingo
>>>
>>
>> Ah! I didn't know that!
>>
>> --
>> Thomas
>
> I remember that from the LOOOOOOONG thread back at:
>
>
http://news.povray.org/povray.advanced-users/thread/%3Cweb.577e597b5ff2a8e65e7df57c0%40news.povray.org%3E/?mtop=409379
>
> (See post by Mssr Grimbert at bottom of pg 1)
>
>
Ah, yes. Like with the oren-nayar feature, I had that little bell
ringing feebly at the back of my mind, but was unable to localise it,
deeming it an early start of senility... :-)
note: I am not going to re-read that loooooooong thread...
--
Thomas
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