P: Large numbers of brush strokes leads to slowdowns and can cause an image's edits to reset.

There's using another app, and there is using the same app in another way that doesn't cause you the same problem.

For example I've found it possible to make and tweak quite specific and complex masks in LrC with the aid of AutoMask. I don't mean the rather crude outcome from dragging the brush around with autoMask active; I mean repeatedly single-clicking a larger radius brush with AutoMask active, working off the crosshair for each click, both adding and subtracting as necessary. This pulls the needed detail from the image itself.

I honestly am not surprised if tens of thousands of simultaneous parametric 'dabs' might cause an issue. Not least, of patience! This sounds like a lot of avoidable work to me.... An equally complicated mask could be made parametrically in PS - say, using tens of thousands of overlapping vector shapes - and also cause an issue there. A pixel mask within PS would be the massively more straightforward way. So there are also tactics in LrC along the same lines.

For example: intersecting with a tonal or hue restictive mask, or using adjustments that are natively restricted in their tonal application, may mean a less tightly and laboriously drawn brush mask is nonetheless equally acceptable towards the end result you want..The painted extent of a mask does not always need to do all of its selective work, IOW.  In LrC, or in PS.

@defaulte1bptwq3szfa 

LrC can handle Brush but only up to a certain point.

After that first you get slowdowns then then the reset.

ACR form my experience doesn't have performance problems.

I was able to work in ACR without performance issues my heavily edited photos, the very same ones that are not editable in LrC...but as soon as the photos are loaded back to LrC they will reset.

Doing the local editing in another app, in Photoshop is a workaround...I could also suggest to use the competition like Capture One.

Let's not forget that there is a standalone license for Lightroom and so many users might not have Photoshop.

Perhaps Adobe should give a free Photoshop license to all Lightroom users so that we all can edit our photos in full since LrC prevents us to.

I discovered and reported this bug internally back in 2017 and yet nothing has been done because back then nobody was expected to use LrC to do local edits.

I was laughed at when I was telling people "I don't use Photoshop for local edits".

With Maksing one should use and do local edits in Photoshop ONLY because of this bug.

Masking is a marvellous tool but as long as this limit exists Maksing is doomed.

If we want to get this bug fixed in Lightroom then the solution is to upvote the bug, so please, I beg of you: vote!

Using another app is not a solution...it's an escape.

P.s.

I am a total Lr fanboy, it pains me much to speak about this...I wish this bug didn't exist.

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Apparently LRC can't handle the brush strokes. You can achieve it in Camera RAW (Photoshop), but you will suffer from performance issues. Best hint I can give is to duplicate your photo and split the brushing, for example top left, top right, bottom left and bottom right. Then merge the photo's together in Photoshop.

@Fnc21 

There is no solution in LrC for this.

What I suggest for your workflow is the following.

1. Use Brush only when indispensable.

The other tools do contribute to reaching the "upper limit" but much less than Brush.

2. Always create a new Brush component when you start drawing.

So you draw, stop drawing > Shift + N to create another new brush component in the same mask.

This means that when you reach the reset point you can undo and go back to the edited photo and delete components that could be done better, this means you keep 99% of your work.

Having a single brush component is bad.

Never do that, ever!

Yes your Mask might have lots of different Brush components BUT it's the right way to work.

Always keep track of every edit you make using separate components...masking is great for this reason as well as it process total trackability of all stpes and edits, its better than Layers in Photoshop.

3. Never use Brush in Erase mode!

Always remove part of a Brush you don't like using another Brush in Subtract mode.

Erase mode should be removed form Lightroom altogether as it's just a legacy of the past and tis terrible because it does not allow to keep track of your edits separately.

Edited to clarify.

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@Rikk Flohr: Photography 

Why was my bug report for the poor performance in LrC vs ACR merged with his one.

One can get poor performance way before a reset even take place.

It's not the same issue.

Countless of users over the years have experienced poor performance using LrC never got a reset, but the poor prefrormancd has never been addressed.

@Rikk Flohr: Photography 

One of my photo had the reset BUT with 2,3 Million dap points (that's what your engineers told me I had on my photo)...which is about 200-250Mb of data.

250k dab points is tolerable by Lr Classic in my experience.

( I don't think it's possible to have 250k individual brush stokes, each made of thousands of dab points!

That would mean having a history of 250k steps, a Catlog potentially in Terabytes in size...no sane human being would do that, not even I can do that and I am insane 🤣🤣🤣)

Yes, in this most recent example, posted by @defaulte1bptwq3szfa the Mask 6 contains over 250,000 individual brush strokes.  The team is evaluating next steps based upon the sample file submitted. Thanks. 

Hi

I am experiencing very odd behaviour when using the adjustment brush.

I have used the brush to lighten text on a gravestone. This worked well but has stopped working for some reason.

Every time I try to make a new brush stroke, Lightroom resets all my previous edits back to Import.

This is very frustrating as I was just finished brightening the text.

I use a Wacom tablet and have disabled touch and side buttons but this has't helped.

Any suggestions other than restarting Lightroom and PC as that hasn't helped either.

Thanks in advance

Hi!

After i use a brunsh and release the muse/pen pressure ALL of my edits on that photo resets!

Does anyone have the same problem and know how to fix it?

I use the following:

Lightroom Classic: V.10.11

Mac bookpro: macOS Big Sur 11.2

Wacomtablet: 6.3.41-2