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Noob color/gamma space question

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jens mehlan

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  • Joined: Mon Mar 06, 2017 7:06 pm

Noob color/gamma space question

PostWed Sep 13, 2017 9:30 pm

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
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alan bovine

  • Posts: 17
  • Joined: Mon Aug 07, 2017 6:20 pm

Re: Noob color/gamma space question

PostThu Sep 14, 2017 5:49 am

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.

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