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Lut highlights

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stig olsen
Lut highlights
on Sep 18, 2012 at 5:20:09 pm

Hi, When working on r3d I do my main exposure adjustments prior to the LUT. Sometimes I need a good key for adjusting highlights and therefore working after the LUT. Some adjustments (like highlight adjustments) will not work properly after the LUT so Im getting stuck with a bad key. How do you deal with that?


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Sascha Haber
Re: Lut highlights
on Sep 18, 2012 at 7:54:29 pm

Using a second input or a parallel node

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stig olsen
Re: Lut highlights
on Sep 18, 2012 at 8:30:20 pm

It does not help because the key need an input from after the LUT.


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stig olsen
Re: Lut highlights
on Sep 19, 2012 at 10:37:33 am

Anyone?

I need to make a key from a node after the lut but to adjust the keyed part properly I need to do have access to the source or a node prior to the LUT.

Stig


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Chris Martin
Re: Lut highlights
on Sep 19, 2012 at 5:33:36 pm

What is the LUT for?


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Ola Haldor Voll
Re: Lut highlights
on Sep 20, 2012 at 6:52:06 am

Try using a Parallel node. You can select what node is the source for the node, or even the main video source as well.


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Rohit Gupta
Re: Lut highlights
on Sep 20, 2012 at 6:59:35 am

Or you can just add a node, feed the input from the source, and only use this node to output a key. This is assuming you don't want to mix back any of the original image. If you need to mix back any of the original image, you can use a layer mixer as well.


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stig olsen
Re: Lut highlights
on Sep 20, 2012 at 7:34:44 am

Hi, I did not explain myself good enough. The key need its source from a node after the LUT (to have s clean key). To adjust this key I need the source from the node before the LUT. These sources need to be connected somehow.


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stig olsen
Re: Lut highlights
on Sep 20, 2012 at 9:00:06 am

It did work by doing this:

- Create a corrector node after the LUT to have a clean key
- Create a parallel node, but change the input to a node prior to the LUT
- Feed the key into the parallel node
- Invert the key or add an outside node to adjust.

This way it will give a clean key (made from after the LUT) and all the corrections will affect the data prior to the LUT but feed it back later in the chain.

Stig


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