Opening files from LR to PS

[alfin]

What happens in the background when you open a file from LR to PS (edit in)?

Does LR export a .tiff (or .psd) to PS, or does LR send the file together with xmp-data to ACR behind the scene and ACR opens a rendered file in PS?

I have a vague memory of older LR and PS versions opening files from LR to PS as tiff (or psd).

Nowadays a file opened from LR to PS show up as .CR2, .NEF, .DNG etc, which of course is not a raw file, but a rendered pixel file.

But what happens behind the scene?

[digitaldog]

IF the data is raw, ACR renders it from that raw and it opens with the rendering settings from LR.
IF it's rendered data, PS just opens it.
IF the data is raw and ACR renders it, it's not any file format like TIFF until you specifically save it as such.
IF the data is rendered but you update an edit in LR, then LR makes a copy, applies that edit and opens it in PS.

[alfin]

Thanks Andrew! Am I wrong remembering older versions of LR/PS opening raw files as tiff (psd) directly in PS?

[digitaldog]

Thanks Andrew! Am I wrong remembering older versions of LR/PS opening raw files as tiff (psd) directly in PS?

Not from raw. It isn’t as yet saved.

[mtakeda]

I understand that it is tiff file after the processing and save in ps. Is there anyway to save and sent the file in raw back to LR? Does it matter that the returning files are tiff or not.

[digitaldog]

I understand that it is tiff file after the processing and save in ps. Is there anyway to save and sent the file in raw back to LR? Does it matter that the returning files are tiff or not.

Raw is read only in Adobe apps, you save the metadata.

[Schewe]

IF the data is raw, ACR renders it from that raw and it opens with the rendering settings from LR.

Actually, that's only true if ACR and LR are in version lockstep. If LR is more advanced (higher LR version than ACR version) then you get a warning that tells you they are out of sync and you can choose to render it anyway-in this case ACR is bypassed and LR will render the raw file and the rendered file is opened into Photoshop.

But this is a special case...ideally you would want to keep ACR and LR version in sync version-wise.

[digitaldog]

Actually, that's only true if ACR and LR are in version lockstep.

Indeed, I should have remembered that.