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22 Messages

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428 Points

Sun, Oct 21, 2018 7:38 AM

Lightroom Classic 8.0: Low quality 1:1 previews in library

I’ve updated my Lightroom classic cc to the latest 8.0 version and have had a series of issues with the quality of the previews.All my photos have 1:1 previews generated as well as smart previews. However, these appear as very low quality when viewed (fit) in the library. However, the full quality is displayed in the develop module.NOTE: Look at the detail in the clouds in the top left cornerI’ve tried discarding and rebuilding the 1:1 preview via Library > Previes... but nothing changes. I’ve also removed and imported the photo again building a 1:1 preview during import but again, nothing changed.This issue makes culling completely impossible unless I do it in the develop module, making me doubt and checking all the time if I am actually looking at images with full quality before deleting.Please help.

Responses

Adobe Administrator

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8.1K Messages

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116.4K Points

2 years ago

Bruno, 

You may just have had a bad install. 

Reinstalling is not too bad if you have a reasonable internet connection. 

1. Restart your computer
2. Uninstall Lightroom Classic CC via the Creative Cloud App
3. Restart your computer
4. Install Lightroom Classic CC via the Creative Cloud App
5. Restart your computer 
6. Launch Lightroom and wait 5 minutes before using (to be safe)

If you still have the Preview resolution issue after this, a preference file reset is probably prudent. 

A Preference File will survive a Lightroom uninstall/reinstall. Sometimes weird behavior is corrected/cured by resetting the preferences. 

Reset Procedure:

1. Close Lightroom.
2. Hold down [Alt/Opt]+[Shift] while restarting Lightroom. 
3. Overwrite the Preferences when prompted by the dialog.
4. Close Lightroom.
5. Restart Lightroom.

Does the behavior continue after resetting the preferences?
 

Adobe Photography Products

Quality Engineering - Customer Advocacy

22 Messages

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428 Points

Problem solved.... Kind of!

I’ve reinstalled lightroom following the 6 steps above. No changes though.

I then reset the preferences following the 5 steps above. Still no changes though.

I then discarded the 1:1 preview as well as the smart preview. There were still no changes but after zooming in at 1:1 in the library, a loading message appeared and the image refreshed and is now in full quality.

Building 1:1 previews again seems to have the same effect (zooming in at 1:1 in library), which is less a pain in the neck.

The reason I said “kind of” is that even though the images appear to be the same (quality wise) between the library vs develop modules, they’re not. If I switch back and forward between the two, I can see a very a small difference in exposure/vigneting. The difference kind of looks like the difference between applying lense correction or not.

The weird thing is that this worked on my Windows PC but not on my MacBook.

22 Messages

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428 Points

2 years ago

Hi Rikk,

Thank you for your response and suggestions.

I’ll have a closer look at these but this cannot be just a bad install. I’ve got the same behaviour on my windows laptop which I previously used and just updated. I am experiencing the exact same behaviour on my newly purchased MacBook Pro, on which I’ve installed lightroom 8.0 from scratch.

Do you think the reinstall is still needed? If I do so, do I need to save or backup the catalog or any of my photos?

Regards,

Bruno

88 Messages

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2.3K Points

2 years ago

Hi, I guess it is the same as already mentioned multiple times, actually also prior to version 8: https://feedback.photoshop.com/photoshop_family/topics/lightroom-classic-cc-images-not-sharp-unless-...

550 Messages

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11.8K Points

Ah, that's prob the one I referred to below

88 Messages

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2.3K Points

For me, it is still the same issue in Library mode after reinstall.  I had the same issue also in Develop mode (there is another long thread there) and there the reinstall helped to resolve the same issue. I had a backup but reinstallation asks whether you want to keep old settings and that worked fine.
In Library Mode I still suffer from the same and I agree - it is really annoying. It had not been always the case. The library mode is reasonably fast (compared to navigating through images in Develop mode) but meanwhile useless due to the bad resolution/artifacts. Develop mode is fixed now, but still very slow. The Lightroom fun time I had for multiple years in early versions is unfortunately over. Once upon a time Lightroom was fast and had the core set of functionality with incredible workflow support. 

550 Messages

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11.8K Points

2 years ago

One thing to try before re-installing. Uncheck "Use Smart Previews instead of Originals for image editing". Do you see an improvement? There's another thread running on a similar issue. I'd dig it out if this is the case..

22 Messages

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428 Points

Hi Jerry, I’ve already tried that as well as disabling the option “use graphics processor” and nothing.

Champion

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2.1K Messages

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36.7K Points

Bruno, are you seeing this issue with ALL image files or just specific image types such as this night shot? I'm seeing posterization in the upper lefthand corner, which is probably due to the Library previews using 8 bit depth JPEGs. Also the Develop module will look sharper at less than 1:1 Zoom view (i.e. Fit) because the Library module uses a more accurate bicubic interpolation and the Develop module a simpler nearest-neighbor interpolation.

Also try using the pyramid Zoom settings (1:2, 1:3, 1:4, 1:8) instead of Fit or Fill, which applies a 2nd interpolation to scale the image.

22 Messages

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428 Points

Hi Todd, it seems to be affecting all images but I can only clearly see the difference in dark images or shadow areas.

I’ve tried using the pyramid zoom settings you mentioned but nothing changes. I can still see a huge difference between the library and the develop module.

Going through the steps Rikk shared above + rebuilding 1:1 previews worked on my windows laptop but it doesn’t work on my MacBook Pro.

I was running out of ideas so I’ve just uninstalled lightroom 8.0 and reinstalled lightroom 7.5. I’ve created a new default catalog and imported 6 photos including the one in the screenshots I shared earlier. Same quality issues!

Nobody asked and I am not sure if this is relevant but my photos are RAW (uncompressed) shot with a Sony a7r iii Camera. It’s roughly 85MB each. Could the file size or the fact that the photos aren’t compressed be the issue?

294 Messages

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4.5K Points

Hi Bruno.  I doubt that the issue is the uncompressed .arw files from your Sony.  I have that exact camera (as well as the a7R II and the Canon EOS 5DsR) and I have never experienced the issue you describe with 1:1 previews.

How large have you set your preview cache for under Preferences?

22 Messages

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428 Points

I’ve got it at 20GB but this catalog has just over 10000 images which I need to cull down to probably 1000.