Thanks.
Using OCIO and RRT (sRGB) yields the expected result. I guess my
confusion was/is with the fact that ACES linear does not produce the
result I expected from scene referred linear data, and I was under the
impression that one of the main points of ACES is to use the linear
light state as the common ground for all colour qworkflows, as it should
represent the light data captured on set irrelevant of input output signals.
In other words, I would a have expected ACES linear to be a lot closer
to the linear light images I have been working with over the years.
It may just be a case of un-learning things to be able to understand
this fully.
Cheers,
frank
On 3/6/14, 8:17 AM, hxpro wrote:
On 03/03/2014 19:52, Frank Rueter wrote:
Actually, scratch that, ACES linear followed by rec709>linear in Nuke
doesn't look like anything I see in RawViewer in terms of saturation.
The gamma looks reasonable though.
Any more hints?
ACES uses very saturated primaries (in chromaticity terms), this means
that just performing a 1D colour space conversion will result in
desaturated looking images. You need to use something like the RRT+ODT
to convert to something 'filmic', or at least you need to map from the
ACES primaries into the rec709 primaries somehow. You'd need to be
careful doing so due to gamut missmatches, which is where a lot of the
challenges are.
Kevin
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