Lightroom Classic: Lens Corrections defaults not correct if Previews are "Embedded & Sidecar"

Johan, did you actually try this for yourself and Import raw files with the File Handling> Build Previews setting 'Embedded & Sidecar' selected? Please see my post below and tell us your results using this Import setting and your 'Default Develop Settings' with 'Enable Profile Corrections' checked.

Yes, I always import with 'Embedded & Sidecar' to speed up import. After the images have been imported I let Lightroom generate its own previews. Lens corrections and chromatic aberration are then applied automatically and correctly.

I have to admit that this could be because I also apply a develop preset on import.

"I have to admit that this could be because I also apply a develop preset on import."
That's not the same type of Import we are discussing here. If you apply a 'Develop Preset' in the Import module LR will automatically build standard previews. This also negates the speed benefit of using 'Embedded & Side car' previews and will prevent you from seeing the issue discussed here.
To duplicate this issue you will need to:
1) Change your 'Default Develop settings with 'Enable Profile Corrections' checked.

2) Import with NO Develop Setting selected in the Import module and 'Embedded & Sidecar' Preview selection.
Once the import has completed confirm you can see the double-arrow icon on the filmstrip in the upper left-hand corner of the thumbnail. Then switch to the Develop module without applying any settings and view the Lens profile panel. What do you see?

No, Lightroom will not automatically build standard previews. It will only do that when I tell it to. The images come in with Embedded previews, and this stays that way until I click on the double-arrow icon in the upper left corner to tell it to build standard-sized previews. Or they will be built when Lightroom is idle (if you set that in the preferences). Maybe I won't see the issue you are discussing, but please don't think you can tell me how my own workflow works.

I never apply Develop presets on Import, but just tried it. Using 'Embedded & Sidecar' preview setting and a Develop preset that applies 'Lens Profile' and 'Chromatic Aberration' settings the Embedded preview is retained as you stated. My apology! However, I still see the issue being discussed her. When I switch to the Develop module 'Lens Profile' shows as 'None' and message 'Unable to load lens profile' (see screenshot below).

Please try the test as I outlined in my last reply and see if you can replicate the issue. Thank you!

“Merely viewing the image in the Develop module without applying any adjustment settings should not cause LR to discard the Embeded & Sidecar Preview and rebuild a new preview.”

Actually, it’s a bit more complicated. The develop module uses its own previews, which are not the same as the previews in the Library and other modules. So switching to the develop module should always cause Lightroom to show you a new preview. The Develop module should never show the embedded preview. However that new Develop preview does not replace the (embedded) one of the Library module either. The Library preview is only re-rendered when you have applied edits, and I think that simply switching to the develop module is already seen as such (perhaps to avoid confusion).

"The Develop module should never show the embedded preview."

It's not showing the embedded preview in the Develop module. Just to be clear it correctly shows the Develop preview, but without the Lens Profile applied.

"However that new Develop preview does not replace the (embedded) one of the Library module either."

When switching back to the Library module with NO settings applied in the Develop module the Library module creates a standard preview with the 'Default Develop Settings' applied and the 'Embedded Preview' is removed.

"The Library preview is only re-rendered when you have applied edits"

In previous versions of LR (prior to 7.5) the Embedded Preview would remain in the Library module until an actual Develop setting adjustment was applied to the image.

"and I think that simply switching to the develop module is already seen as such (perhaps to avoid confusion)."

This is actually not the issue of concern here and if Adobe changed this behavior it is just an undocumented change. I'll take it either way!

Just to be clear the real issue is that when using 'Embedded & Sidecar' the LR 'Default Develop Settings' for Lens Profile are not being respected when 'Enable Profile Corrections' is a part of those settings. In fact an error condition is created, "Unable to load lens profile."

Nicholas, I do agree it is a bug and this is the correct place to report it. I've added my 'Me To' which is the best way to get Adobe's attention.

I checked my LR catalog using John R. Ellis Any Filter plugin and it appears running 'Build Standard-Sized Previews' "fixes" the Embedded & Sidecar and Minimal Import Preview  issue and the other two issues he mentions above.

In addition any image files that have outdated or no Standard preview should be rebuilt anyhow to maintain performance. Files that are up to date or have never been edited in the Develop module will not be rebuilt and don’t affect the preview building overhead. Here's how:

1) To speed the preview building process go to menu Edit> Preferences> Performance and check 'Generate Previews in Parallel.' Close and restart LR to apply this setting change.

2) In the Library module Catalog panel (left-side) select 'All Photographs.' This will allow checking and rebuilding previews for ALL of the files in the catalog.

3) Go to menu Library> Previews> 'Build Standard-Sized Previews.' This can take hours and will make your system sluggish so you may want to run it overnight.

NOTE: If LR appears sluggish when editing images after completing the preview building process you may want to uncheck 'Generate Previews in Parallel.' Try it both ways and decide for yourself.

Going forward the ‘Standard’ Build Previews selection should be used in the Import module until this issue is fixed.

I disagree with your last conclusion. Importing using ‘embedded & sidecar’ still has the advantage that the import process itself is much faster. After the images have been imported, you can click on the double arrow icon of one of them, and then select the option to build standard-sized previews for all these images. You may have to apply a develop preset to get it to work correctly, so here is the trick: create a develop preset that applies the lens corrections and use that. As I said at the beginning, this is how I work and I do not experience the problem of missing profiles.

I'm reluctant to suggest using 'Embedded & Sidecar' since the Lens Profile issue being discussed here appears related to the issues John R. Ellis  mentions above. I feel it is prudent advice. If you or anyone else has confidence that it's NOT causing any problems  on your LR system (including the ones John mentions) then by all means go ahead and use it.

I tested both Embedded & Sidecar Preview Import with Lens Profile excluded from the Default Develop Settings and then Standard Preview Import with Lens Profile included. Embedded and sidecar was actually significantly slower (34%) with 'Generate Previews in Parallel' NOT checked. With it checked Embedded and sidecar was slightly faster (5.3%), but not much! I'm sticking with 'Standard' Import Preview Building setting. YMMV, so test it for yourself.

71 Canon 5D MKII CR2 (21 Megapixel) raw files with 2560 px Medium Standard Preview

Generate Previews in Parallel NOT checked
Embedded & Sidecar w/o Lens Profile: 63 sec.
Standard Preview with Lens Profile: 47 sec.

Generate Previews in Parallel checked
Embedded & Sidecar w/o Lens Profile: 38 sec.
Standard Preview with Lens Profile: 40 sec.

Interesting observation. It seems that something has changed in the import sequence recently, probably in LR 7.5 in fact. I always add the imported photos to a collection, and use the moment they appear in that collection as the moment of 'being imported'. Because stacks are local, I want to work with them from within that collection.

Until recently, Lightroom would first generate all the standard previews, and then as the last step they would appear in the collection. That made import very slow, and 'Embedded & Sidecar' made it much faster. Now the sequence seems to have changed. I see the images appear in the collection and then the previews are being updated. That makes the difference between Standard and Embedded indeed much smaller. I timed it for 30 Sony A7R III images and see the same difference of 'Embedded' now only about 10% faster.

Good to know, thanks. That makes Embedded & Sidecar a lot less useful (pretty much useless in fact).

"Until recently, Lightroom would first generate all the standard previews, and then as the last step they would appear in the collection. That made import very slow, and 'Embedded & Sidecar' made it much faster. Now the sequence seems to have changed."

I remember the same behavior when first using Embedded & Sidecar Preview workflow with LR Classic 7.0 back in October 2017. I didn't run any tests to compare it against Standard Import Previews because it was clearly much faster. It would still be useful if you have to review a shoot at 1:1 Zoom view before editing since building 1:1 Import Previews will take much longer. Begs the question as to what changed and is it a bug?

Will do–Thanks Rikk!

In the discussion of the original topic, it looks like the cause of these symptoms is the same, using embedded previews.

Rikk on my Windows 10  ver. 10.017763 system with LR 8.2.1 import using Embedded & Sidecar Previews the Lens Proilfe is not applied when switching from Library to Develop module and applying Basic panel Tone edits. However, if I switch to the next image file and back it is applied.
Also randomly clicking on thumbnails in the filmstrip in the Develop module causes some image files to have the Lens Profile applied, but not all. It's very random with no specific pattern I can determine.
Even hitting the Develop module Reset button with defaults set to apply Lens Corrections doesn't work. It remains as below.

Hi Todd,

Are you seeing this issue on some specific set of files or is it more general?

Chinoy, it appears to be a general issue. Here's a video of an import using Embedded & Sidecar previews with LR 8.2.1 on Windows 10 ver. 10.017763. Please let me know if you need any other information.

https://www.dropbox.com/s/pw52j3g49pt3234/LR%208.2.1%20Embedded%20and%20Sidecar%20Preview%20Import.m...

Same behaviour for me with LR 8.3.1 (Windows 10) - bunch imported files from Canon 60D, Canon EF 50 mm F1.4 lens. Some of the images (from a panorama sequence shot with exactly same settings) display error "Unable to load profile" and don't display camera profile. In Develop, unchecking and checking again "Enable profile corrections" correctly assigns profile. Side effect of the bug: when merging images to panorama, warning is displayed that  Lightroom is unable to perform lens corrections due to missing lens profiles.