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Author Topic: Auto Mask on Brushes in Lightroom Classic  (Read 709 times)

pflower

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Auto Mask on Brushes in Lightroom Classic
« on: March 08, 2022, 01:36:07 pm »

In the older versions of LR one could create a brush and then restrict it by either the Luminance Range or Colour Range.  I found this extremely useful, however I am struggling to understand how the new masking features work.

From what I can work out the auto mask function, when using a brush, works by selecting based upon colour.  That's fine.

But I can't work out how to create a brush that responds to and only to the luminance range.  I can set a luminance range, narrow or widen it and then add a brush, but every time I do that and make a change with the brush the entire image appears to be affected.  Previously I could create a brush, restrict the brush to a luminance range and then paint over an area so that only the areas with similar luminance to where the cross hair was positioned are affected.  I just can't seem to do that with the new version.

Am I being stupid or missing something?  Any thoughts?

Thanks

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mcbroomf

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Re: Auto Mask on Brushes in Lightroom Classic
« Reply #1 on: March 09, 2022, 06:14:17 am »

I don't think you can any more.  Best I've been able to do is to brush the area, and if I get sloppy to use Subtract then the Luminance range option.  It seems to take more keystrokes than before but I need to work on it. 

I should add that I typically use the sliders to refine a small brush selection.  eg if I want to increase the exposure in just one area of shadow on the image I will brush that area, but rather than use the Exposure slider I'll use Shadows and/or Blacks to limit any sloppy brushing.
« Last Edit: March 09, 2022, 06:56:05 am by mcbroomf »
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RikkFlohr

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Re: Auto Mask on Brushes in Lightroom Classic
« Reply #2 on: March 11, 2022, 02:43:44 pm »

Intersect mode is what you want:

Select Luminance - Intersect with Brush
or
Select Brush - Intersect with Luminance Range

Intersect mode is analogous to the previous tools' behavior.
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Rikk Flohr
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mcbroomf

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Re: Auto Mask on Brushes in Lightroom Classic
« Reply #3 on: March 11, 2022, 08:02:56 pm »

Intersect mode is what you want:

Select Luminance - Intersect with Brush
or
Select Brush - Intersect with Luminance Range

Intersect mode is analogous to the previous tools' behavior.

Great, got it!  Thanks

Mike
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pmmallette

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Re: Auto Mask on Brushes in Lightroom Classic
« Reply #4 on: March 12, 2022, 10:22:48 am »

Intersect mode is what you want:

Select Luminance - Intersect with Brush
or
Select Brush - Intersect with Luminance Range

Intersect mode is analogous to the previous tools' behavior.

THANK YOU!!
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digitaldog

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Re: Auto Mask on Brushes in Lightroom Classic
« Reply #5 on: March 12, 2022, 01:25:53 pm »

Rikk is probably too modest to suggest you view this so I will:
https://www.youtube.com/watch?v=GDg6FdNdufs
You'll learn a huge amount about the new masking workflow by viewing.
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Author “Color Management for Photographers" & "Photoshop CC Color Management" on pluralsight.com

mcbroomf

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Re: Auto Mask on Brushes in Lightroom Classic
« Reply #6 on: March 12, 2022, 02:12:25 pm »

Excellent .. thanks for posting it Andrew, and thanks Rick!
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Rand47

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Re: Auto Mask on Brushes in Lightroom Classic
« Reply #7 on: March 13, 2022, 11:14:05 am »

Rikk is probably too modest to suggest you view this so I will:
https://www.youtube.com/watch?v=GDg6FdNdufs
You'll learn a huge amount about the new masking workflow by viewing.

Thanks for this!  I thought I had a good handle on the new masking panel, but there is some really worthwhile info in this tutorial on “combinations” of the masking features that had not dawned on me from my own exploration.

Rand
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Rand Scott Adams

pflower

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Re: Auto Mask on Brushes in Lightroom Classic
« Reply #8 on: March 13, 2022, 07:26:08 pm »

Thanks. I had completely missed the intersect option in the masking controls.  I've also watched your video and think I have at least got a basic understanding of what is going on - although a very quick and cursory attempt at using it shows that I am going to have to spend some time experimenting.

Having used Lightroom since v1 I thought I had a pretty good grasp of how to use it - but this is a fairly dramatic development that is not intuitive from my past experience with earlier versions.  So many thanks for your video and explanations.



Intersect mode is what you want:

Select Luminance - Intersect with Brush
or
Select Brush - Intersect with Luminance Range

Intersect mode is analogous to the previous tools' behavior.
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