Am 20.01.2019 um 13:07 schrieb Thomas de Groot:
> On 20-1-2019 9:33, ingo wrote:
>> in news:5c442a26$1@news.povray.org Thomas de Groot wrote:
>>
>>> However, Bald Eagle's
>>>
>>>       function {
>>>         NormalMap(x,y,z).red +
>>>         NormalMap(x,y,z).green +
>>>         NormalMap(x,y,z).blue
>>>       } 1.5
>>>
>>> gives a much better result and thus may be preferred.
>>>
>>
>> .gray and .hf = 0.3 * red + 0.59 * green + 0.11 * blue, so yes there's
>> quite a difference to be expected.

To be precise, it is 0.297, 0.589 and 0.114, respectively.

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