Tom Evans

Display LUT

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I need to do basic VFX in After Effects on some Alexa RAW log footage. What is the best workflow for this? Can I load the original clip and apply a log to linear display LUT, work on that and remove it before I render? Do I need to set up the project in a specific color space? 

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Thank you Bruno. Is it the file "Core Library v1.0.9 – .zip .tar.gz" that I should download? Any information about how to implement it? I'm not so very techy when it comes to anything that is harder to install than Red Giant plug-ins ment for the average user.

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Hi Tom,

I'm guessing that's what you need. It should be an installer that puts the OpenCOlorIO AEX plugin into the appropriate folder.

I was asked to help test it out a while ago for someone who was going to use it in their ACES workflow. In the end, they decided not to go ACES, so I never got around to trying it out.

I have a copy of the manual which I'll attach here. Hopefully it will give you all the info you need to install and test the plugin.

OpenColorIO AE Manual.pdf

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Although there's no display LUT option in AE there is a 'Simulate Output' setting, which is tied in to the whole colour management workflow that Adobe recommend when working in AE.

I never got my head completely around all of this, and how it interacts with the OpenColorIO plugin, but I suggest you take a look at the Adobe article and video as linked below.

https://helpx.adobe.com/after-effects/using/color-management.html#enable_or_disable_display_color_management

http://tv.adobe.com/watch/learn-by-video/after-effects-color-manage/

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Simply go to effects/utility/cineon_converter and set the parameter to Log to Linear, and turn it off before rendering.

Remember, you don't have to complicate things, a full transform is not necessary and it would work just as good to draw a curve or use levels to add contrast to your images. The important thing is that you deliver the same (log) image to the next dep. in chain.

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