What can ACR do that LR can't?

[digitaldog]

Here is a statement I read that confirms my suspicions all along.
"For accurate detail work like Sharpening and Noise Reduction, the 1:1 on a Smart Preview is not the same as the 1:1 on the original uncompressed file. You’ll have to perform these types of adjustments once you have the original file available again. "

No, again this has no effect on the original image data but it does have an effect on the previews AS you edit them.
Your suspicions are off.
Without Smart Previews, you can edit Sharpening and Noise Reduction without being at 1:1 or greater and you're editing blindly. Not recommended.
Smart Previews are previews.
Edits are edits (ideal or otherwise).
Edits ARE applied to the original data if you let it. As you should.

[digitaldog]

View this all or fast forward to 9 minutes in:
The ULTIMATE GUIDE to Lightroom SMART PREVIEWS
https://www.youtube.com/watch?v=uyQjK20xhY8

[texshooter]

Jeff Schewe said in his tut Advanced Guide to Lightroom 5:

"The DNG in the Smart Preview knows from which file it came. What that means is that it knows it started life as a high resolution file and now has been downsampled. So if I set the sharpening on the low-resolution DNG, Lightroom will automatically interpolate correctly the radius and sharpening amount on your high-rez file."

This makes sense to me, so I conducted a test to confirm. I created a Smart Preview of the subject image and then disconnected my drive containing the original RAW. I then applied sharpening and noise reduction to the Smart Preview. Then I reconnected the drive. Lightroom recognized the drive and presumably applied its radius and sharpen amount interpolations to the the original file. But the actual sliders in the Detail panel did not move one bit. So I will assume the interpolation happened even though the sliders did not move. I will also assume that the interpolation that Schewe spoke of is mathematically perfect. So yes, editing Smart Preview DNGs is just as good as editing full-size RAWs.... I trust.

[digitaldog]

So yes, editing Smart Preview DNGs is just as good as editing full-size RAWs.... I trust.

Yes. AGAIN, it is simply a PREVIEW. Hence the name. What makes it smart is that you can work offline and then on line, and end up as if you didn't work off line.

[StephaneB]

Sorry to revive an old discussion, but I noticed the other day that in ACR one can use a curve with a mask, ie. local adjustment. that, to my knowledge, is not possible in LR.

[digitaldog]

Sorry to revive an old discussion, but I noticed the other day that in ACR one can use a curve with a mask, ie. local adjustment. that, to my knowledge, is not possible in LR.

Not yet. Key is yet..... 

[StephaneB]

Not yet. Key is yet..... 

Great news! Thanks!

OK, my next thing to look forward to is Adobe adding an AI-based noise reduction tick box in the enhance dialog box. But I digress.

[digitaldog]

Great news! Thanks!

What news? 

OK, my next thing to look forward to is Adobe adding an AI-based noise reduction tick box in the enhance dialog box. But I digress.

No comment
But keep in mind that Adobe Camera Raw and Lightroom Classic are on processing engine parity so we can go back and forth between the two. Using Edit In Photoshop in LR actually calls Adobe Camera Raw to render, so there's another reason. The teams have different release schedules. So if you see a feature in one, you can pretty much safely bet, it will be in the other if the feature is processing the data. 

[jrsforums]

Not yet. Key is yet..... 

But it has been promised for months!!

[digitaldog]

But it has been promised for months!!

For some, a promise kept. 🤫
Did anyone promise you when you're getting it? 🤔

[jrsforums]

For some, a promise kept. 🤫
Did anyone promise you when you're getting it? 🤔

Quite unnecessary and beneath you, Andrew!

[digitaldog]

Quite unnecessary and beneath you, Andrew!

I'll take that as a 'no' (no date promised) answer <g>.

[jrsforums]

I'll take that as a 'no' (no date promised) answer <g>.

You constantly need to show your ‘bottom’, don’t you?

[digitaldog]

You constantly need to show your ‘bottom’, don’t you?

I'm sorry if the facts have ruined your day.

[jrsforums]

I'm sorry if the facts have ruined your day.

…and again…hard to keep your pants up, it seems! 😀

[digitaldog]

…and again…hard to keep your pants up, it seems! 😀

Seems is the key above:
"The problem with assumptions is that we believe they are the truth." -Miguel Angel Ruiz

This is simple. You came into this post late, going OT about a promise that is months old. Fact: some of us (not you) have seen the promise provided.
Adobe nor anyone who has seen the promise fulfilled told you when you'd get the feature. As far as you know, it might be days or months away. You don't know. I do. I can't (I will not) tell you, neither will Adobe or anyone who signed an NDA.
I promise, it IS coming.
Now sit back like a good boy and wait. You really have no other options anyway!
I'm again sorry if these facts have ruined your day.

[jrsforums]

Seems is the key above:
"The problem with assumptions is that we believe they are the truth." -Miguel Angel Ruiz

This is simple. You came into this post late, going OT about a promise that is months old. Fact: some of us (not you) have seen the promise provided.
Adobe nor anyone who has seen the promise fulfilled told you when you'd get the feature. As far as you know, it might be days or months away. You don't know. I do. I can't (I will not) tell you, neither will Adobe or anyone who signed an NDA.
I promise, it IS coming.
Now sit back like a good boy and wait. You really have no other options anyway!
I'm again sorry if these facts have ruined your day.

Much ado about nothing…as usual, it includes useless quotes.  I did not ask for a date, nor did I expect it…..nor did I make a big deal about it, which you, again, seem to be making…..plus trying to improve your (useless) image by alluding to an NDA….who cares!!

[digitaldog]

Much ado about nothing…as usual, it includes useless quotes.  I did not ask for a date, nor did I expect it…..nor did I make a big deal about it, which you, again, seem to be making…..plus trying to improve your (useless) image by alluding to an NDA….who cares!!

Those that respect facts based on experience probably care.
Those that hijack posts with rants about a promise not made (by date), don't.  Much ado about nothing…as usual.
I'm not suggesting anything. I'm telling you the facts which you can't process; fine.

Your OT rant:

But it has been promised for months!!

Quite unnecessary and beneath you, John!

[jrsforums]

Those that respect facts based on experience probably care.
Those that hijack posts with rants about a promise not made (by date), don't.  Much ado about nothing…as usual.
I'm not suggesting anything. I'm telling you the facts which you can't process; fine.

Your OT rant:Quite unnecessary and beneath you, John!

Nope…I get the last (probably next) word😀 (you are so predictable)

[digitaldog]

Nope…I get the last (probably next) word😀 (you are so predictable)

I'll stick to the facts:
I promise you'll get the feature. Someday, by surprise, but not today.
You can get the last, incorrect, absurd word on that topic John.