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paytonfrost
Participating Frequently
May 11, 2023
Answered

Lightroom Develop Preview Quality is Low Below 100% Zoom

  • May 11, 2023
  • 3 replies
  • 2759 views

The preview quality of the develop module is poor until zoomed past 100%. At "fit" view this isn't much of an issue, the preview quality looks okay, but at 70% zoom it looks like that "fit" preview was just scaled up. At 99.6% zoom it's the same story, but at 100.5%, the image immediately clears up, looks great.

 

I put screenshots of the issue here: https://imgur.com/a/M9umgcw

 

I'm using Ryzen 5900HS, 3070-8gb, 40gb RAM, 1tb nvme. Windows 10, Lightroom CC12.3, nvidia studio driver 531.61. Tried disabling GPU, didn't work, Camera Raw Cache at 12gb, couldn't find many other tweaks. 

 

Seems like a bug since I don't remember this being an issue on previous versions of Lightroom.

This topic has been closed for replies.
Correct answer RomasBudras

Do you have "Use Smart Previews for editing" enabled (in Preferences > Performance)? Smart Previews are low-quality downscaled images used for faster editing, and only at 100% the original raw image is used.

3 replies

R
RomasBudrasCorrect answer
Inspiring
May 12, 2023

Do you have "Use Smart Previews for editing" enabled (in Preferences > Performance)? Smart Previews are low-quality downscaled images used for faster editing, and only at 100% the original raw image is used.

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paytonfrostAuthor
Participating Frequently
May 12, 2023

Ohhhh I'm an idiot!

 

This was the correct answer. I had "Smart Previews" enabled, unchecking it fixed everything, and my sanity is restored. You're a saint, thank you.

 

I used to use Smart Previews when I had an underpowered laptop years ago, so I'm familiar with their usefulness. My current laptop is relatively new and when I set up lightroom again I thought it was an issue with the graphics driver or a deep performance setting or a buggy update or something else. Didn't realize that when setting up lightroom the option had either been checked by default, or I had checked it not knowing the consequences and forgotten about it.

J
Community Expert
Jao vdLCommunity Expert
Community Expert
May 12, 2023

You really only want to use powers of two zoom in Develop. The others are done by scaling up or down those powers of two. Especially close to 100% it is a real issue just due to the scaling algorithms. There you really only want to use 100% or higher.

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    paytonfrostAuthor
    Participating Frequently
    May 12, 2023

    It didn't used to be like this. It used to be that whenever I zoomed in a bit, the preview would update so that at the screen resolution I still had a high quality preview. 

     

    And the workaround to this is to zoom past 100%, then zoom back out to my preferred level because then the preview is high quality. Yes it's not perfect 1:1, but it's way better than the low quality I showed in the example images. 

    D Fosse
    Community Expert
    D FosseCommunity Expert
    Community Expert
    May 12, 2023

    There's one thing you don't seem to realize: At 100%, one image pixel is represented by exactly one physical screen pixel. So 100% is a significant number, unlike any other. It's the only zoom ratio that displays the exact pixel structure of the image. Any other zoom ratio means resampling of the screen image, with inevitable softening and artifacts.

      TheDigitalDog
      TheDigitalDog
      Inspiring
      May 11, 2023

      How (and why) are you setting the zoom to 99.6%?

       

      Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"
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        paytonfrostAuthor
        Participating Frequently
        May 12, 2023

        Hold shift and click and drag with right mouse for scrubby zoom to allow for fine control of zoom level.

         

        The point is that I'm getting a low quality preview at any level less than 100% zoom. This is an issue because if I'm editing a portrait, I might zoom into a face to see it better and have it fill the screen. That zoom level might be at 40%, 70%, or at 95%. Each of those zoom levels I'm going to see a bad preview that doesn't allow me to work accurately. I have to zoom past 100% each time, and then zoom back out to my preferred zoom level.

        TheDigitalDog
        TheDigitalDog
        Inspiring
        May 12, 2023

        Still no answer: why are you setting the zoom to 99.6%?

        100% (1:1) or greater zoom in any such product* is the only way to avoid preview subsampling. There is nothing wrong here other than user (zoom setting) error.

         

        *https://community.adobe.com/t5/photoshop-ecosystem-discussions/photos-look-pixelated-when-zoomed-in-at-certain-levels-in-photoshop/td-p/9196101

         

        https://www.quora.com/Why-are-images-in-Photoshop-rendered-badly-when-viewed-at-33-33-or-66-67-zoom

        Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"
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