[Bf-committers] Colour Pickers and Apple P3 Filmic Update

Sergey Sharybin sergey.vfx at gmail.com
Mon Mar 13 09:19:29 CET 2017


Currently we are using default view of the display and require it to be an
inversible transformation. While some Grumpy Canadian will argue that we
should be using color_picking role for that, the answer would be: this is
correct, but supporting this is not trivial because of the way how color
picking works. Basically, you'll have to figure out what color management
was used at the point of where you clicked the picker.

On Mon, Mar 13, 2017 at 5:58 AM, Troy Sobotka <troy.sobotka at gmail.com>

> Greetings all.
> I'm hoping that there are a few people out there with Apple P3 displays.
> This would include all 2016 MacBook Pros, as well as the 2015 iMac P3
> models, and likely any Apple desktop devices released this year and onward.
> The reference space in Blender is currently set to use BT.709 / sRGB based
> primaries. That means that the colour of the lights are of three particular
> and unique colours. For those that are aware of the Filmic transforms,
> there is a new Apple P3 display variant that is designed to test the
> default sRGB EOTF output.
> An interesting side note regarding the Blender UI, that I think Campbell or
> the Grumpy Russian might be able to answer...
> It seems when I change to the new Filmic Apple P3 display, that the colour
> picker for setting RGB albedo values becomes constricted. This is
> surprising and rather extraordinary at the same time. I believe that the
> pickers use the View transform selected, and I think this constricting
> behaviour is due to the pickers preventing of negative values? This would
> happen when someone attempts to select a value that is within the Apple P3
> gamut, but beyond the BT.709 / sRGB gamut.
> Is this a correct deduction?
> More information:
> https://github.com/sobotka/filmic-blender/issues/9#issuecomment-286014087
> Filmic Development Branch:
> https://github.com/sobotka/filmic-blender/tree/development
> Thanks everyone for their eyes and testing...
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With best regards, Sergey Sharybin

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