Issue with DNG File Display on iPhone After Exporting Smart Previews from Lightroom Classic

[roman_0313]

When I import photos into Lightroom Classic 14.0.1, RAW files from a shoot, and create Smart Previews, corresponding DNG files are generated in the *smart previews.lrdata catalog. If I copy these DNG files to an iPhone, some of them display strangely — contrast is lost, and strange color tinting appears. I am attaching 2 RAW files and their corresponding DNG files, where one displays correctly, but the other does not.https://drive.google.com/drive/folders/1yv8R3-vFUsO2vw05HgfVPLPgaCnAxmfJ?usp=sharing

[Moved from ‘Bugs’ to ‘Discussions’ by moderator, according to forum rules.]

[John R Ellis]

The DNG smart previews aren't intended to be used outside of LR. They contain a reduced-resolution, 2560-pixel linear-raw representation of the image and a 256-pixel JPEG thumbnail.  Apparently the Iphone viewer, like the Mac Preview app, misinterprets the linear-raw representation as a normal RGB image and gets the colors all wrong.

DNGs can contain optional larger-resolution JPEG previews, but LR doesn't store such previews in the smart-preview DNGs, presumably to make them as small and fast as possible (the whole point of smart previews).