Lightroom: Weird, temporary pixelation in photos (Win)

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  • Problem
  • Updated 1 year ago
  • Not a Problem
  • (Edited)
Hi, Since the previous version of Lightroom, I've noticed a weird pixelation in photos when scrolling through. It happens randomly but I've noticed it more on photos of poor quality i.e. terribly underexposed images. This sort of pixelation may appear when(I've only tried reproducing today) 1. I've simply click on an image in the film strip or scroll to it using the left and right keys. 2. On even rarer occasions, I would scroll to an image, it would load fine but then the same pixelation would appear temporarily when I zoom in. 3. The same also happens when I go back and fort between "affected images" in Develop module then quickly go to Loop view(by clicking the E key). In scenario 1 and 3, if I zoom in and out, it would rectify. I have tested with GPU enabled and disabled and the problem still persists. p.s. the problem doesn't just occur on sample images               

System info: Lightroom version: CC 2015.9 [ 1106920 ]
License: Creative Cloud
Operating system: Windows 10
Version: 10.0
Application architecture: x64
System architecture: x64
Logical processor count: 8
Processor speed: 3.4 GHz
Built-in memory: 16325.8 MB
Real memory available to Lightroom: 16325.8 
Graphics Processor Info:
GeForce GTX 1060 6GB/PCIe/SSE2
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Jerry Syder

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Posted 1 year ago

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Simon Chen, Principal Computer Scientist

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I see that you have both the Smart Preview and Original present, and the "Loading..." bezel is showing. The artifacts probably because of the temporary showing of the Smart Preview and perhaps there was heavy image adjustments applied on the photo.

You can confirms this by either
1) Discard the Smart Preview for the photo (Library>Previews>Discard Smart Previews) and relaunch Lr. (in case this case, you'll probably not see the artifacts)
2) Temporarily toggle Preferences>Performances>Use Smart Previews instead of Originals for image editing and relaunch Lr. (in case this case, you'll probably always see the artifacts)
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Jerry Syder

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I had a feeling it was this as I started using Smart Previews recently to speed up workflow. I guess I would have to put up with this as it is a lot faster especially on these 36MP files. I had already toggled the Use Smart Previews option on and off and the same happened in both instances, with it on or off. So in other words, this is an expected outcome if heavy editing is done on an image where the Smart Previews are used. At least it's good to know. Thanks Simon