[Bf-vfx] Mango Samples with ACES via rrt_sRGB

[Troy Sobotka]

On May 16, 2012 3:21 PM, "Brecht Van Lommel" <brechtvanlommel at pandora.be>
wrote:
>
> I can't say that applying a 2.2 gamma makes the images look clearly
> better to me.

Hard to know, but they might be on the crunched side it seems.

It is worth testing against log just in case.

The obvious solution is to get a shot of the Macbeth chart he likely shot.
>From that, it will become extremely clear if we are in the ballpark. It is
possible to even compare against the numerical ACES values once there.

> The difficulty with this stuff
> is, how to verify that the conversion we are doing is right, i.e.
> neutral?

See above.

I will try a few tests tonight.

>
> If I understand this right, you propose to let OCIO do the S-Log to
> ACES conversion instead of the F65 software, and see if the result is
> different than converting to ACES there directly?

Yes. I suspect there will be an SGamut DPX Log out?

> Also, my understanding is that the F65 has three color temperature
> settings: 3200k, 4300k and 5500k.

It appears that only the tungsten and daylight LUTs are provided. Not sure
what is going on under the hood.

Regardless, the process is far ahead of where it started.

Let's hope OCIO can find a much needed home within Blender during Mango...

With respect,
TJS
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.blender.org/pipermail/bf-vfx/attachments/20120516/4e8014a5/attachment.htm