P: Finder and Explorer do not yet support recent DNG thumbnails.

[Vigira32931500v2og]

Lasted Lightroom classic V13 Export with "Lossy" lead to corrupted Thumbnail.
With camera raw 15.3 selected will lead to corrupted Thumbnail and Data Header.

With cemera raw 14 select will work like it always do on any version.

[Vigira32931500v2og]

Issue: 

• Lightroom Version Number: 13.0.1
• OS Version Number: Windows 11 22H2

Steps to reproduce:

1. Import from Camera
2. Export with DNG
3. Use setting from Above picture attach

Expected result: DNG file with Thumbnail
Actual result: DNG File with corrupted Thumbnail

[Vigira32931500v2og]

Not sure why this was move out from "Bug" to "Discussions"

[Rikk Flohr: Photography]

I am unable to replicate this problem using the instructions supplied. 

In what application are you viewing the DNG that shows it is corrupted? Can you provide a file and/or a screenshot?

[Vigira32931500v2og]

Dear Rikk,
The First picture show after Export with "Lossy" and Camera raw 15.3

The Second picture show after Export with "Lossy" and Camera raw 14 (It ALWAYS work like this before)

Both are on Microsoft Windows 11 Explorer View and MacOS 13 on Both Thumnail and Open to view

After update MacOS14 the Thumbnail are show and openable, MSWindows are on lasted update

[Vigira32931500v2og]

This report to happen with many of my photographer friend too.
The intruction above are correct and can replicate everytime.
Fresh OS install are also affect except if you using MacOS14

[Rikk Flohr: Photography · Accepted solution]

Mac and Windows do not currently support the later DNG Spec you are using to create your DNGs. This will require updates from Apple and Microsoft. 

[Vigira32931500v2og]

Dear Rikk,

I just notice we are might in the wrong foot here.

The Bug happen after Selected "Lossy Compression".
If we Export the DNG file with Camera raw 15.3 then it Show Thumbnail in both Explorer and Finder.

Just when we select "Lossy Compression" WITH "Camera raw 15.3" and then the Thumbnail will break and will only able to open and viewable.

I Understand that it require lasted tech from OS but DO YOU REALLY THINK it not a bug from "Lossy Compression" that corrupted the Thumbnail after the compress reduce those file size not in the proper way like it always use to do? 

[Vigira32931500v2og]

Just when we select "Lossy Compression" WITH "Camera raw 15.3" and then the Thumbnail will break and will only able to open and viewable.

* and will only able to open and viewable in MacOS14*

[lineb57216290]

Exporing raw files to dng in the new updated Camera Raw 16 doesnt show preivews of images on the files, and only shows the standard file format image. This is only an issue when setting compatibility to Camera Raw 15.3. Exporting with Camera Raw 14 doesn't give this problem. This is just after updating to the new Camera Raw 16 today. 

Mac OS Ventura

MacBook Pro / Appel M2 Max (64g)

Photoshop 2024

[jamiesondean]

I believe Adobe has changed the compression for the most recent version of DNG spec 15.3 compressed DNG. I've noticed that the file sizes are now under half the size of the same files using v14. I've also noticed that they no longer appear to add noise/grain to the files... I wonder if Adobe went from using JPEG compression to a high efficiency format for the newest compressed dng spec?