ACEScc vs ACEScct

Hi to all,

Just wondering if anyone knows de difference between ACEScc and cct.



Thanks!

Hi to all,

Just wondering if anyone knows de difference between ACEScc and cct.



Thanks!

A new color correction working space has been added to ACES 1.0.3. The new working space, known as ACEScct, is intended to address some colorists' desire for a grading behavior similar to that of traditional log film scans. ACEScct is intended to be an alternate color correction working space to ACEScc for those who prefer its grading behavior. As such, developers implementing ACES 1.0.3 in products that previously only used ACEScc should offer end users a choice of ACEScc or ACEScct in the user interface as the color correction working space. Among the characteristics of ACEScct is a more distict "milking" or "fogging" of shadows when a lift operation is applied when compared to the same operation applied in ACEScc. This is a result of the addition of a "toe" to the non-linear encoding function. It is important to note that ACEScct is NOT compatible with ASC-CDL values generated on-set using the ACESproxy encoding. If there is a need to reproduce a look generated on-set where ACESproxy was used, ACEScc must be used in the dailies and/or DI environment.

So if I understand correctly it is only about the UI and control sensitivity right and such a workflow destroys multi application same color expectation as it's been promoted by the aces all the way?

yea that seeems about right..

for some workflows it could make some folks happy, and i can see no harm in offering the option as long as one understands the choices made and how it affects the entire workflow

If there is a need to reproduce a look generated on-set where ACESproxy was used, ACEScc must be used

if one does not care about accuracy of the onset grades, or that the VFX artists worked with an inaccurate CDL, and loves the logish feel of cct... then all good?

This chart may make it a bit easier to understand.

ACES cct.png (53.4 KiB) Viewed 12743 times

Peter;
where did you find that chart?

http://acescentral.com/

good readings...

http://acescentral.com/t/acescc-vs-acescct/485/2

ahhh it had not been posted last time i looked, i was too early...

it is a good resource

So, the bottom line is that ACEScc is better to use than ACEScct?

Aram K, someone I follow on YouTube, said that ACEScct makes the shadows harder to work with. Is that the case? Or is there a better way to explain it?

Thanks.

best is to try it for yourself
and ignore youtube "tutorials"
ACES Central is a resource that's solid in the real world

best is to try it for yourself
and ignore youtube "tutorials"
ACES Central is a resource that's solid in the real world

Thanks. I'll sign up for ACES Central.

best is to try it for yourself
and ignore youtube "tutorials"
ACES Central is a resource that's solid in the real world

Thanks. I'll sign up for ACES Central.

Also, ACES central is the place where the people that "made aces" live....

the only (dearly) missing is Jim Huston, that passed early this year...

Sorry to hear about Jim Huston passing away.

Can you recommend any tutorials for working with ACES and Resolve?

the best i've seen are from Baselight's Daniele Siragusano and Andy Minuth, the concepts are universal, Resolve has many of the tools (but not all) under diffrent names:

https://www.filmlight.ltd.uk/training/r ... mt_Pt1.php
https://www.filmlight.ltd.uk/training/r ... mt_Pt2.php
https://www.filmlight.ltd.uk/training/r ... w_ACES.php

it's pretty straightforward, open a project, and try try try

Resolve lacks colorspace aware tools, i was useing ACES in Nucoda before using it in Resolve, Nucoda has colorspace aware tools so the responce to the artist is much the same in scene refered or display refered workflows

Unfortunatly Resolve lack this so the responce on some tools is, uh, to be polite, sub-optimal as the tools are mapped for display refered workflow only, takes some getting used to, but that's tool responce in Resolve only, not anything to do with ACES its self

Thanks for the resources.

Just thought I'd add this in case anyone else stumbles on this thread (excerpt from acescolorspace.com):

ACEScc & ACEScct (AP1 primaries)
ACEScc and ACEScct are primarily used for color grading. This is not a linear colorspace and maps black at 0 and white at 1. ACEScct is similar to ACEScc except it has a "toe" or a gamma curve in the dark values of the image. This allows grading/editing software to behave and feel like it did while working in other colorspaces making some colorists very happy.

Toe segment in ACEScct is linear, not based on gamma curve.