Image degradation when passing from Lightroom to Photoshop

[janssen.rgm]

I notice quite some image degradation when I pass a photo from lightroom to photoshop and back to lightroom: I loose sharpness, contrast and get more noise.

- I have edited a raw file in lightroom

- I select edit in photoshop

-The image opens in photoshop

- Without making any change in photoshop, I save the image and return to Lightroom

- The resulted image in lightroom has a noticible degradation (sharpness, contrast, noise).

I have the latest levels of software (according to Adobe Creative Cloud).

In Lightroom in "Preferences External Editing" I have set ProPhoto RGB, bitdepth 16bits

In Photoshop "Camera RAW preferences" I also have ProPhoto RGB, bitdepth 16bits.

Anything I am missing???

Thanks

Rob Janssen.

[GoldingD]

In LrC, what profile have you applied?

hmm, assuming RAW.

[janssen.rgm]

yes.

[GoldingD]

Also in LrC, any non standard presets applied? Presets that are not from Adobe.

[janssen.rgm]

None. To be sure, I did a reset to go back to the original image and followed the same process with the same result:

The image that came back from Photoshop looks different (worse).

[TheDigitalDog · Accepted solution]

Might want to check this out and see if you're doing the same thing as the OP (the issue being export):

https://community.adobe.com/t5/photoshop-ecosystem-discussions/my-photos-are-clear-in-camera-raw-but...

You have to view the image(s) in Lightroom Classics Develop module at 1:1 to evaluate the image quality. 

[janssen.rgm]

Indeed, when looking at the images 1:1 they look the same.

I than did an export to a .jpg file and both exported images look identical as well.

So, for one reason or the other, an image that has been passed through Photoshop is displayed

in a different way than an image that has not left Lightroom....

Knowing this behaviour, I can deal with it.

Thanks!