Lightroom Classic 8.3 Visual Differences between Library Loupe View and Develop View

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I am seeing fairly significant visual differences between the Library Loupe view and the Develop view with Lightroom Classic 8.3.  The Loupe view is showing a lot more sharpness and contrast compared with the Develop view.  When I export with output sharpening set to none, the view shown in Loupe is much closer to the final JPG than what I see in the Develop view. 

Obviously not great when the export looks different.  Especially with the photo being one where there is a lot of noise (like a Milky Way shot) and there ends up being so much extra sharpening and contrast the export isn't something I can share because it looks so different from what I saw in Develop. 

At first I thought it was a problem with export, but as I continued testing things I discovered that Loupe view looked like the export.   Even though the Loupe view is a good way to tell what the export is going to look like, this is not workable if Develop isn't showing an accurate view.

I have reproduced on both Windows and Mac:
  • Windows 10 Pro 1809 (10.0.17763 Build 17763) with NVIDIA GeForce GTX 1060 3GB graphics card and the most current NVIDIA drivers (430.64)
  • macOS Mojave 10.14.4 on MacBook Pro (13, 2017) with Intel Iris Plus Graphics 640

I have screen shots I can share to illustrate the differences.  The difference is more extreme on Windows than it is on Mac for me, but there is still a difference on Mac.  I have already done the preferences reset and that did not solve the problem.
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Jeff Harmon

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Posted 4 weeks ago

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Tom Mickow

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Jeff Harmon

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Different from that.  After zooming into a photo in the Develop module it takes a moment to show the full detail of the image, but when I zoom back out (still in the Develop module) it looks the same as I did before zooming in, which is very different from how things look in Loupe.
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Venkatesh Penjuri, Official Rep

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Hi Jeff Harmon, thank you for providing the details of the issue.  I have verified this on a few edited milky-way RAW images on Mac 10.14.4 and Win10 and I do not see much difference. Could you please upload a sample raw file with edits? 
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Jeff Harmon

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You can see a video of the issue here: https://www.dropbox.com/s/9smba77xwxswcy4/DevVsLoupe.mov?dl=0

I have tried the same image in 8.2.1, the same issue is there.
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Todd Shaner, Champion

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I am seeing fairly significant visual differences between the Library Loupe view and the Develop view with Lightroom Classic 8.3.  The Loupe view is showing a lot more sharpness and contrast compared with the Develop view.  When I export with output sharpening set to none, the view shown in Loupe is much closer to the final JPG than what I see in the Develop view. 
The Library and Develop modules use different interpolation algorithms that can make the Loupe previews appear different when the image has a lot of noise, such as your high ISO 3200 DNG file.
https://forums.adobe.com/message/7327718#7327718

To make your Export files, Library preview, and Develop preview all appear the same you need to apply Luminance noise reduction at 1:1 Zoom view to reduce the visible noise. You have it set at 0, which with an ISO 3200 image is going to cause this issue. Also reduce Sharpening settings as necessary to help reduce the noise. Below are your settings and settings I used that correct the issue. Give them a try and see if that helps. You may need to go back and adjust the Local Adjustment Brush settings since some have a high Noise value that my no longer be necessary with the Global Detail panel Luminance noise reduction applied. Best practice is to adjust these Global controls first before making any Local corrections.

It appears you also applied 'Enhance Details to the original raw. Given the long 10 sec. exposure time star movement is visible, which lowers the image sharpness. Enhance Details will not help this image and may even make it worse from a noise perspective. I suggest applying the edits in the DNG to the original raw file and using it.

(Edited)
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Jeff Harmon

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Seems like there should be better consistency without having to follow some kind of recipe for applying noise reduction.  I love being able to target my adjustments better with range masking rather than doing it globally.  Seems like doing so shouldn't produce such a dramatic difference between the two previews, or I guess more important Develop preview should be accurate to what an export looks like no matter how the noise adjustments are being applied.
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Todd Shaner, Champion

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Jeff, first applying the Global settings in the Basic and Detail panels is the normal workflow. For low ISO image files with little noise there's generally no need to change the Detail panel settings if those settings are the ones you normally use. For high ISO image files with visible noise you will need to adjust the Detail panel settings. Following this workflow can save you a lot of Local editing time!

The default setting for the Luminance control is 0, which insures maximum image sharpness. If you don't like the idea of having to adjust the Luminance control for specific images then set it to 25. It is ISO setting and camera model aware and automatically applies increasing amount of Luminance noise reduction based on the camera's actual ISO setting noise performance. With a 25 Luminance setting low ISO images in the 50-800 range will retain virtually the same image detail as the 0 setting. Images like your night sky shot will require additional Luminance noise reduction, but you can certainly choose to apply that using the Adjustment Brush and other Local controls.
I guess more important Develop preview should be accurate to what an export looks like no matter how the noise adjustments are being applied.
The Develop module 1:1 Zoom view is in fact the most accurate preview inside LR. The problem is looking at the image at less than 1:1 Zoom view due to it using the less accurate nearest-neighbor interpolation algorithm. This is required to prevent control lag when making adjustments. Conversely the Library module provides the most accurate preview at less than 1:1 Zoom view since it and the Export module both use the more accurate bicubic interpolation algorithm. It's a simple "recipe" to insure what-you-see-is-what you-get! Anytime the Develop and Library modules look different the most likely cause is insufficient Luminance noise reduction and/or over-sharpening, which is easily corrected.
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Jeff Harmon

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I see.  OK, makes sense.  Thanks!
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Yves Crausaz

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macOS 10.14.5 LR Classic 8.3 iMac 5K no differences, only one second between the update on the magnifying glass in the case of changing a setting of developpement.
une question, do you work with 2 screens and whether your two monitors are calibrated correctly with a probe calibration?
(Edited)
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Jeff Harmon

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I am seeing this on a single monitor setup.
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Jeff Harmon

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I have validated this is not an issue with only 8.3.  Downgrading back to 8.2.1 it is the same and the thing that concerns me is that image can look so different in Development than what I end up getting when I export the file.
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Victoria Bampton - Lightroom Queen, Champion

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If you go right back to 4.0, I think you'll find the same. If you go back even further, it would be even more different.
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Jeff Harmon

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I was afraid of that.