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On 5-3-2018 8:40, Thomas de Groot wrote:
> On 4-3-2018 15:51, Kenneth wrote:
>> Thomas de Groot <tho### [at] degroot org> wrote:
>>
>>>>>
>>>>> It is a bit like your airbrush.
>>>>>
>>>>> --
>>>>> Thomas
>>>>
>>>> I'd like to see.
>>>>
>>>
>>>
http://news.povray.org/povray.binaries.images/thread/%3C48295282%40news.povray.org%3E/
>>>
>>>
>>
>
> :-)
>
>>
>> BTW, re: the discussion there of 'bending the slopes of
>> height_fields': It can
>> be done in an alternate way now, using POV-Ray's 'blend gamma'
>> feature-- i.e.,
>> by purposely changing the gamma of the image that's used to make the
>> HF. That
>> effectively changes the otherwise 'linear' slope of HF contours to
>> more of a
>> curve. For example, HF mountains made this way look more natural to my
>> eye--
>> like the mountain's slopes have naturally eroded. (There's also a HF
>> difference
>> between images SAVED at different gamma values, for the same reason--
>> 1.0 being
>> a linear slope, 2.2 being more of a curve.)
>>
>
> Indeed. That is something I never really used purposefully but which you
> do well to remind me of. Thanks!
>
> I shall make a small test scene. A way for me to remember stuff.
>
Like this. Left, image gamma is 1.0; right, image gamma is 2.2.
--
Thomas
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