Aces for LOG-Rec709 roundtrip in After Effects

[yooofi (Roei T)]

@shebbe

Because ACEScg is a linear colorspace you can use this as the sandwich to do all your effects in but doing it in linear rec.709 or linear Arri Wide Gamut would be equal in math if I’m not mistaken.

I have noticed a different behavior but it’s just not worth the hassle it’s sooo error prone it’s insane. it’s better to leave it as rec709 linear or not and use OCIO to convert.

@shebbe

I’ve made an example setup from that same project earlier. Maybe that helps.

thank you, after days with this, this is similar to a setup I also created. I have a few questions about the project:

1. why all the adj layers and not applying the OCIO directly on the footage?
2. I have seen you use output as input, I think it’s not so good it creates clipping, better use generic or utility-rec079-curve I see. see the difference
   

@shebbe

Lastly I’d say this is all great and I find being able to use ACES for composites in AE really cool but so far I’ve rarely used it because working in 32bit just destroys performance in AE compared to other software. If you can live without it for simple composites I’d always do it unless there really is a specific reason to use it.

I also never used 32bit unless I had CG that needed that, and lately I noticed when comping and coloring log footage I also needed 32 or else I got clipping. not too much of a performance hit in my composites but I could always go to 16 and 32 interchangeably. the one thing that I almost never do is linearize working space… only when I have to when I have CG that needs multipass and was created in linear. but I am always thinking maybe I should start doing that…