Lightroom: Local Brush issue (square artifact)

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  • Updated 7 years ago
  • (Edited)
When using the local brushes in Lightroom 3, often a large square space will appear in the mask, indicating that I painted (or erased) part of the mask in this square shape. I did not paint the square mask, and when going back in my brush history it deletes this problem. The extra area added when using the brush tool is always a square, and seems to happen more when I am using the erase brush, but this occurs with the regular brush too.

Also, I will notice sometimes that other areas have suddenly become affected (not in a square pattern) when using the brush too. Again going back in the history and finding the affected state solves the problem. If I do not notice that this has occurred until some time after it happened, going back in the history negates much of the work I have done. This is, needless to say, aggravating. I have found this problem mentioned by others when searching Adobe forums, and it seems this local brush bug has existed since version 2, so I fail to see why this problem has yet to be addressed.

Thank you.
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Mark Sheehan

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  • frustrated

Posted 7 years ago

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Lee Jay

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I've seen it, but for me it's just a visual display problem - it doesn't affect the image. Just moving around inside the image, zooming in and out, or going to another image and back clears it up right away.

The affecting other parts issue is more complex, I think it's only with the exposure brush, and it's harder to correct.
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Mark Sheehan

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Here is one I just noticed, going back through some old images... I'm happy I checked this. Here are screen shots of two images, one is the way the mask should look, and the other is what happened suddenly when I came back to the image after working on some others. You can see these splotches on the right on the projection screen as well (though not under the selected mask) This was fixed again by going back in my history, though the history state that this effect was attached to was a change I made under camera calibration, so I have no idea how this would effect my local brushes... If I can get a screen shot of when this problem happens in the square that I described in my original post I will post that as well.

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Lee Jay

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That looks to me like you had autosync on by mistake when you edited the other images.
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Rob Cole

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Autosync sometimes (infrequently) turns on by itself if I've been using it recently, even when I've turned it off. I wouldn't believe you if you told me that (sounds like operator error coupled with denial), but I've seen it enough times now its no longer hypothesis. I've solved the problem by never using it. It hasn't gone on inadvertently since. PS - When adjusting multiple photos simultaneously, I most often want relative adjustments instead of absolute (Lr-Autosync does absolute), which I do using a plugin which lacks native smoothness (and local adjustments) but gets me through the day without Lr-Autosync.

Moral of story: Beware of autosync...

Summary:
=======
Two issues here:
1. Rectangular selection when brushing - I've seen this too.
2. Inadvertent brush edits, which I postulate *may* actually be an autosync bug, and not a brush bug.
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Mark Sheehan

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I would say this is a good idea, however... I never use auto sync, and only use the sync function for overall adjustments (white bal, etc... no local adj). So unfortunately I do not think that this is the problem. Also, if this were the auto sync, the brush marks on the second screenshot are in spots where I made no adjustments on this group of photos.

When I have seen these splotches in the past this has happened with the photo I was working on too.. I'll make one click with the brush and suddenly there are splotches all over the image. I go back one step in the history and it's gone. It's the strangest thing.
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Rob Cole

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Well, that shoots my theory all to heck. I have seen your bizarre behavior #1 (rectangles), but not the second (splotches) - strange indeed...
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Mark Sheehan

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Also, I forgot to mention that this occurs only when lightroom is running slow or lagging. I am running a Mac, v10.5.8, 4gb of ram, and a 2.66Ghz intel core duo. I have tried everything possible to cut down on the lag time: close programs, optimize my catalog, you name it... anything that does not need an admin password, as this is my work computer (these are all photos for my job). The only thing that I can think of is that the networking software my office uses is causing my computer to run slower than it should, as the Banner software my office uses really was not made with Mac in mind (as is my understanding, or at least this is what our IT guy tells me) and that the overall slowdown of my machine is causing these problems. For all I know, the system could be lagging so much that my key commands are getting mashed together and causing the autosync to turn on with out my knowledge... I will be keeping an eye out for that (I really hope that's the issue).

Otherwise I am stumped. Thanks for your suggestions!