Imported Profiles Don't Show in Browser

Oooh, I think I may have figured this out.

tl;dr - If I convert the Pixel 3 DNG to an "official" Adobe DNG, things work like I expected.

I was wondering if maybe there was something "weird" in how the Pixel 3 was saving its RAW DNG files. Remember, the DNG files are something created by the phone itself (as opposed to, for example, how my Nikon stores RAW files as .NEF which are later converted to DNG)

So I tried an experiment that seems to have worked - basically, I used the Adobe DNG Converter to convert my Pixel 3 DNG into Adobe DNG. When I created a profile based on that Adobe DNG, instead of the original Pixel 3 DNG, the profile shows up.

Here's the modified steps I used that worked.

• Copy a "raw" file from my Google Pixel 3's /Pictures/Raw folder to a temp folder on my PC (FYI the Pixel saves its raw files as DNG)
• Use Adobe DNG Converter to convert the "raw" Pixel 3 DNG. To make things easier, I told DNG Converter to put the converted image into a separate folder. I'm calling that image the Adobe DNG
• In Adobe DNG Profile Editor, open the Adobe DNG image
• Interestingly, the "Base Profile" says "Adobe Standard (Google Pixel 3 Rear Camera)".  When I first tried this (using the Pixel 3 DNG) the Base Profile was only "Adobe Standard (Google Pixel 3)", without the "Rear Camera" suffix.
• I make some random changes to the Hue, Saturation, and Lightness (just to see if it works)
• I select File > Export Google Pixel 3 Rear Camera profile, and save it as "T:\temp\Google Pixel 3 Rear Camera Test.dcp"
• The DNG Profile Editor tells me "Google Pixel 3 Rear Camera Test.dcp was exported successfully"
• I exit DNG Profile Editor, and choose to not save the recipe.

Then, I open Lightroom

• Like before, I select File > Import Develop Profiles and Presets
• I pick the DCP I just saved: "T:\temp\Google Pixel 3 Rear Camera Test.dcp", and click "Import"
• In the Library module, I click Import
• I select the Adobe DNG file I used as the image for the DNG Profile Editor, and click "Import"
• When I go to the Develop module, the profile now shows up under "Profiles" as "Google Pixel 3 Rear Camera Test" (see screenshot below)

I verified the profile shows up for all other Adobe DNG images that were converted from Pixel 3 DNGs.

Interestingly, though, it also seems to show up for Pixel 3 DNG images that haven't been converted.

So the key seems to be to use the DNG Profile Editor based on an Adobe DNG image, not the Pixel 3 DNG image, and the resulting profile will work for both Pixel 3 DNG and Adobe DNG images. YMMV.

I found something on the web (of course, I can't find the link again) that said the "Import" is actually the recommended method (as opposed to placing the .dcp manually).

FYI, when I look in C:\Users\[username]\AppData\Roaming\Adobe\CameraRaw\CameraProfiles, I see:

• An Imported folder, under which lives the exported .dcp file
• An Index.dat file. If I look in that file, there's definitely some special characters, but in it I can see the complete file/path name of the .dcp file that's in the Imported folder

Yes, I actually tried just importing them directly from the phone (without the intermediate step of copying to my drive) - same result.