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Noob color/gamma space question

PostPosted: Wed Sep 13, 2017 9:30 pm
by jens mehlan
Hi guys, all new to Fusion 9 and cannot for the life of it wrap my head around how to linearize alexa logC footage and display it correctly. What I am trying to do is:

Alexa logC footage -> log to lin -> all compositing with CGI coming in at 16bit float / linear -> lin to log -> write everythig out.

Granted, it IS late... Any help is greatly appreciated,
J

Re: Noob color/gamma space question

PostPosted: Thu Sep 14, 2017 5:49 am
by alan bovine
If you've set up OCIO, I would suggest you use that. If not,

Bring in the footage, use a Gamu node to convert from alexLogC to to linear (color and gamma), do your comp and output as linear EXRs (if thats your delivery target)

But most importantly, make sure you are using a display LUT that matches your target output. Nuke defaults do sRGB unless you tell it otherwise; fusion can do the same. Click the little LUT icon in the viewer, use a Gamut Lut and set the input to linear and output to sRGB. If you rightclick in the viewer afterwards you can then click "save as default" and this viewer will then always have the same LUT on.

However, I would always recomend OCIO in this case if you've got experience with it.

I'm running fusion with a full ACES and OCIO film pipe and it works exactly the same as in Nuke.