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Erratic involuntary brush strokes while using the Adjustment Brush in LR Classic

Joined
Dec 27, 2012
Messages
38
Lightroom Experience
Intermediate
Lightroom Version
Lightroom Classic version: 9.3 [ 202005281810-476e492c ]
Operating System
Windows 10
While editing an image with adjustment brush, I get very slow response and erratic and involuntary brush stokes. It happens on numerous files, but very frequently on the file I'm currently editing. There are numerous brush edits in this file and response time and brush stroke errors are particularly aggravating. I am attaching a file with screen images to show the types of errors that are occurring and a System information file in case you need more information.
I have upgraded the graphic driver two times in the past couple of months and it does not solve the problem.

I would appreciate any help you can give.
Thank you
 

Attachments

Joined
Nov 5, 2017
Messages
830
Location
UK
Lightroom Experience
Power User
Lightroom Version
Classic
One thing that can slow Lr down is a lot of History Steps (you mention numerous steps)

Try (on a particularly affected file) clearing them (little 'x' in the top right of the History Panel) - this can help. You can still amend / remove brush strokes after.

See page 472 of your Classic book for more information.
 
Joined
Jun 13, 2017
Messages
341
Location
Melbourne, Australia
Lightroom Experience
Advanced
Lightroom Version
You can try using a Smart Preview for editing - I find this improves the slow brush problem on my old and under-powered system.

Although your system specs look good enough that I wouldn't have expected much of a performance problem, so it might be worth your time investigating other tweaks to improve performance.
 
Joined
Dec 27, 2012
Messages
38
Lightroom Experience
Intermediate
One thing that can slow Lr down is a lot of History Steps (you mention numerous steps)

Try (on a particularly affected file) clearing them (little 'x' in the top right of the History Panel) - this can help. You can still amend / remove brush strokes after.

See page 472 of your Classic book for more information.
Thanks Paul,

I deleted the extensive history as you suggested and it appeared to have a marginal effect on responsiveness. I also had fewer erratic strokes when adding or modifying brush strokes. I have noticed this problem with few other files, but not on the scale as the current file.
Thanks for your help.
 
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