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The things that Lightroom can do, don't need to go to Photoshop.
Other things have to be done in PS using different methods and stored differently than would have happened in LR; or else, LR could have done them
. These different methods may themselves have nondestructive aspects to them; in that some or all of those operations may be fully reversible, or may otherwise remain adjustable. But these are only nondestructive in their own terms, not in Lightroom's - in that the limit on how far BACK they are reversible, is up to Photoshop - and no longer up to LR.
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Thanks for the answers. I'm still a little confused. What exactly does LR edit if not pixels? Does the Spot Removal tool, as an example, not move pixels around?
Regarding disk space, it's not as cheap as you think, when you factor in the need for backups. One TB worth of stuff effectively requires you to have three 1TB drives (at roughly $100 these days): one for originals, one extra for onsite and one more for offsite backup. For a shutter happy person who doesn't do photography for a living, this starts to add up quickly
As for converting to jpegs, I use PS almost exclusively for panos (some of which get up to 1GB is size as TIFFs). It's easy enough to redo them if I need to (I still have the original RAWs with whatever edits I've done in LR in preparation for sending them to PS), so that's why jpegs work for me. Besides, it's not like I'm going to sell them panos - they're there for me to look at them and get transported back to the place where they were taken
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pixel editing edits the data of the pixel (for example the RGB values)... parametric editors leave the pixel data alone and only record the changes you make to that pixel as parameters.... that´s it in short.
of course when you render an image (export to JPG or TIF etc.) the pixels appearance will be changed.
the parameters will be used to create a new pixel in the exported file. but the original pixels are not touched!LR was created for that kind of operation.... photoshop not.
http://dpbestflow.org/image-editing/image-editing-overview
http://dpbestflow.org/image-editing/parametric-image-editing
http://dpbestflow.org/image-editing/pixel-editing
http://www.adobe.com/digitalimag/pdfs/non_destructive_imaging.pdf
i don´t know how easy you think it is to rewrite a program but what you wish will not happen the next few years.
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Thanks to Agfaclack for the links, and thanks Mr. Schewe for a further elucidation. I think I'm beginning to understand the problem
. I have one last question. Would it be possible to do image stitching (i.e., panoramas) in a future version of LR? I suppose the answer is no (this requires layers, right, something that LR does not/cannot do), but maybe I'm wrong.
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