LR5 Fill mode preview in Library module is not sharp

Hi,
I just discovered, that when in Library module, and viewing my photos in Fill mode, it is not sharp. It is in fact so blurry, that it is unusable. Not sure I remember it correctly, but it happened also during the tethered shooting and viewing image on secondary monitor.
Interesting thing is, that once in a Develop module, Fill mode preview is sharp. I tried different settings re preview in Catalog Settings and Preferences, but no success.
I would like to know, if other users are experiencing anything like that too? Googling I found several such problems described in the past. I wonder, why this apparent bug was not fixed ages ago ...
Thanks,
Petr

Hi, so I did so, no change. Now let's not talk about the difference between Develop and Library modules, but about Library module itself. Why all other previews, e.g. 1:4, 1:2, 1:1 are sharp, Fit mode is sharp, but Fill mode is not? Is there any internal difference to how Fill mode works? I insert the photo here for you to see the difference:

Similar Messages

Previews in Bridge CS5 are not sharp

The preview panel images in Bridge CS5 are not sharp (almost blurry). Also when I select a thumb and view it using the space bar method (from within the Bridge) the image doesn't appear sharp. Anybody have an idea why? They look fine in Bridge CS4. I've been looking for a preference setting to no avail. Doesn't matter if it's RAW or JPG (same results).
When I select an image and view it using the space bar method (while in the finder) it looks sharp/normal.
Thanks.

[I've replied to the wrong thread, but this is still relevant]
The soft previews also affect raw images which have been cropped within Camera Raw. The 100% preview within Bridge looks soft compared to when editing in Camera Raw.
Raw images which haven't been cropped look sharp at 100% magnification, but not fit-to-screen.
The raw files I'm dealing with are CR2, not DNG. However, I converted one to DNG and tried the full size jpeg preview option, but it looks the same. Even if it did work, it would mean converting all CR2 files to DNG, which is a lot of extra work to get round this one problem.
Here's what I'm seeing. They are both viewed at 100%. The first file shows a screen capture of the Bridge preview, the second within Camera Raw. Again, the raw files are cropped images, which seems to cause this 100% preview problem.
http://img22.imageshack.us/img22/7183/bridgepreview100.png
http://img16.imageshack.us/img16/4445/cameraraw100.png
Message was edited by: ja3754

LR5.5 no panels, no library, modules are currently inaccessible and I can't import photos

Running Macosx 10.75 on a mbp 13' mid 2012. Roughly 5000 in my LR catalog. Two days ago I opened LR to find panels and library absent. My checked my backups, the dates of backup are correct but they have all been reduced to roughly 75mp. I believe the files are still present on my hd and outside LR.
I'm not sure what has caused this and not sure where to go from here. Thoughts? Thanks.

bump

Web Module Pics Not Sharp

If I use a collection of photographs to post on the web should I allow LR to process these to the right color space, jpg and 100% quality. I tend to do a copy as DNG when I import them of the card.
Or should I export these photos into the right color space, jpg and 100% quality and then add them to the collection and then up to the web.
I am not impressed with the quality of the photograph after the upload using a LR web gallery whether that be the built in galleries or some of the TTG (Turningate) galleries even though I used the highest settings?
The images don't appear sharp to me.

I would not suspect there would be a difference between natively exporting first of exporting the Web Galler directly. Did you apply sharpening during export of the Web Gallery?
Beat

Different view to develop and library module

Hello everyone, I have a big problem during my workflow, or when working images from the development at the end of the work as the images are like me and very sharp. But when I see in the library module are not sharp and the blacks are very mordibi. Below I post the link to see for yourself.
MODULE DEVELOPMENT:
MODULE LIBRARY:
The problem is that when I export my image is identical to the form LIBRARY and not that beautiful clear form DEVELOPMENT. So I find myself not export images with crisp blacks and dishes.
I already tried to delete the cache, but does not change anything, and I use 1:1 previews, you have no idea how to fix my problem?

twenty_one wrote:
Ah, now I see the rightside of that screenshot, with, as you say, sharpening 150 and NR 0. That's a combo it would never even occur to me to use, not in a hundred years...
Anyway, I tried this with an ISO 1250 shot, but couldn't see any differences anywhere. But maybe you need to go higher.
I've learned to never take anything for granted when reviewing LR forum posts. An ISO 1250 shot is probably too low with most DSLR cameras to see this issue. On my 5D MKII I could really only see the "lightening" between Develop and Library views with ISO 6400 raw images. It may also show up at lower ISO settings with images that are heavily underexposed (i.e. LR Exposure +1 and greater), and with smaller sensor cameras (1.6 crop, P&S).
Gianlu24, keep in mind that Adobe increased the Sharpening amount from '100' in LR3 to '150' in LR4 when using a high 'Masking' setting. For most normal images and Masking settings you should use a Sharpening amount below '100.' There are two basic types–Capture and Output sharpening, each adjusted using separate controls. In addition you can apply both Global and Local Capture Sharpening in LR. These three articles by Laura Shoe may be helpful:
http://laurashoe.com/2011/08/21/sharpening-in-lightroom-part-one-overview-and-capture-shar pening/
http://laurashoe.com/2011/09/27/creative-sharpening-in-lightroom-sharpen-eyes/
http://laurashoe.com/2012/07/11/sharpening-in-lightroom-part-three-output-sharpening/

LR 5 Library module issues

I have read all the problems that other have been having with LR5 & the library module running slow. I have been using LR5.2 since it was released with no issues of slowness, the only issue I had was that sometimes the position of images shown in LR did not match what was shown in Finder. Opening & closing LR seemed to correct this.
I have a Mac with Version 10.8.5. 2.8 Ghz Intel Core i5, 4gb 1333 Mhz Memory & 3Tb hard drive. I have 56,000 images in one catalogue.
Everything was fine until this morning. Last night I uploaded 700 images. This morning all was fine. I had shot some images to use for HDR, so decided to update Photomatix Pro HDR from version 4 to version 5. Despite following the instruction the automatic download & install did not load the plug in into LR & it kept loading version 4. I deleted Photomatix 4 & 5 from the computer & re-loaded version 5 only.
From then on the library module has locked up & I can not get access to the catalogue. I have logged out & back in several times. I have a LR back-up & have exported the key words to a back up file.
I am a photographer not a computer expert so if anyone is able to make any suggestions they will need to be simple.
Is uninstalling both Photomatix Pro & Lightroom & reinstalling them an option?
What do I need to carefull with so as not to lose information on the images?
Any help would be appreciated.
Neil Vincent

I had been using Photomatix Pro 4 as a plug-in to LR, I upgraded to Photomatix Pro 5, it appeared to have installed correctly.
When it first happened I was in the library module as that is from where you access the plug in. I tried the plug in Photomatix Pro 5 for the first time & the HDR image which was created did not re appear in LR as it was supposed to. I tried a second time & the same thing happened, the image created did not appear in the LR light table view. I scrolled through the LR files on the LHS of the screen & found two “ghosted” image icons (still in LR library module). I tried to delete these from within LR & it would go through the normal delete screens but right after I clicked that I agreed to “remove them from the disc” a message would come up saying something like “they could not be deleted as they were aliases”. (I cannot recreate this message as the library module is frozen)
I tried a number of times but the same. I went to Finder to the original folder containing these “aliases” to delete them from there but they were not there. I searched Finder using “date created” but there were no files of that name.
Using a program called Appcleaner I deleted all versions of Photomatix from the computer & then downloaded & re-installed Photomatix Pro 5. This time it worked with LR creating a HDR & loading it back into LR in the correct position. LR Library module was working fine at this point.
The two “aliases” were still showing so I decided to close LR to see if that cleared them. When I reopened LR the files down the LHS in the library module did not all “fill” some were greyed out, when I tried to scroll down I noticed that some folders were missing. As I used the slider on the LHS to scroll down it would not go passed a point about halfway down the screen, it would let me go back up but not down passed that point. I was not able to expand the parent folders (the visible parent folders are six months shooting, inside each is the individual shoot folders) but if I selected one of the parent folders slowly it would show all the images in that folder on the light table view but I was not able to scroll down those photos.
I opened & closed LR several times with the same result. I completely shut down the computer & re-opened LR with the same result. I then changed modules to Develop module to see what was happening there, all was good, the same with the other modules. I then tried to go back into Library module & the tab in the top right hand corner changed from Develop to Library but rest of the screen stays as the develop module screen. The tabs along the top line only read Lightroom/File/Edit/Window/Help none of the other library module tabs are there, if I go into develop they are all as they should be. It stays like this... frozen, I can go back into the other modules & they work.
While writing this email I switched back to the Library module & received an error message for the first time. It read “an error occurred when attempting to change modules”
I have replied to your email directly as when I went to the forum I could not find a reply key. Where is this?

Lightroom pictures blurred in Library module - Rendering: Larger Preview...?

I am using the latest version of Lightroom running on a system using Vista Ultimate 64bit OS, an Intel Core i7 processor, 12 Gb of ram and two nVidia GTX295 video cards. I problem that I am having is in the Library module, where, when I move from picture to picture, some pictures, at random, will load blurred. The caption, in the lower center of the picture starts with "Loading from Previews" then goes to "Rendering: Larger Preview," and it stays there. I can move to another picture which may or may not load properly. This issue does not seem to affect the Develop module; pictures which load blurred in the library mode are crisp and clear in the Design module.
I did not have this problem running Windows XP!
Any suggestions to address this issue?
p.s. I have read a previous thread which suggested that deleting the preference file might be a solution. I have done this, without success!
jwp

My suggestions would be to backup and check the integrity of your catalog, to render standard previews for all images, and if necessary to delete the previews file and directory.

Specific Problem with Library Module 1:1 Preview Loading

Hi everyone. I've spent hours searching Google & forums for specific tips to try but I've found nothing that solved my problem. I have a very specific problem loading 1:1 previews in Lightroom 3.3 while zoomed to 1:1.
When I initially import a shoot (usually 3000 to 6000 images), I always render 1:1 previews during import. My understanding is that this activity writes full-sized previews to the "Previews" folder, but I also have observed that .DAT files are created in the "Camera Raw Cache" folder. I have my Lightroom Previews folder and my Adobe Camera Raw Cache folder on the **same** solid-state hard disk, which is dedicated to Lightroom.
When I browse these newly-imported images in the Library module in Loupe view at 1:1 zoom, it's very zippy and fast to switch between images. The images load without any message at a lower resolution, and then "snap" to full resolution after 0.25 to 0.5 seconds. No "Loading" message appears.
However, once the previews have "sat around for a while", even if they are still supposedly available in the Previews folder, loading the image at 1:1 in Loupe as described takes 3-5 seconds. Shortly after going to an image, the message "Loading..." is displayed (it doesn't say where from), and 3-5 seconds later, the full res image appears.
This has nothing to do with changes to image settings requiring re-rendering of the preview. These are images that I've imported but haven't browsed in a while. I know that the previews are valid, because I can go to "Library > Previews > Render 1:1 Previews", and the task will complete within 20 or 30 seconds without re-rendering any photos after examining them and apparently finding that there are still valid 1:1 previews for all 4000 of them. After doing this "re-render," the slow loading behavior is the same as before, because the re-render process always completes without actually updating the previews that it found are already there and presumably decided were still valid. Discarding previews by "Library > Previews > Discard 1:1 Previews" and then trying to re-render them also does nothing, because LR3 apparently doesn't immediately delete the discarded previews, so they are picked back up again As-Is by the re-rendering process.
If I had to guess at the reason for this behavior based on the symptoms, I would say that it seems like Lightroom is forcing itself to re-render 1:1 previews upon browsing to images that are older than a certain age (very possibly the same "30 days" after which the 1:1 previews are supposed to be discarded).
Now, I've also observed that deleting the DAT files in the Camera Raw Cache folder has no adverse impact on load speed (which is what I would have expected to see if LR3 was looking for and loading images from this cache instead of the Previews folder).
What this means to me is that once the image previews reach this "outdated" state, I can't get fast 1:1 browsing performance in Loupe with any reliable procedure other than manually deleting [in Windows Explorer] the entire Preview folder and then re-rendering the 1:1 previews for this shoot. This is of course terribly inconvenient when there are recent previews that I want to save.
Note: I do not have any slowness under any circumstance when browsing at "Zoom to Fit". This is only a problem when I'm browsing at 1:1 zoom (like when I'm comparing sharpness between a set of photos).
Note: For images with the slow behavior described, once the image has been loaded once at 1:1 zoom, it's henceforth snappy again when returning to the image (as if Lightroom was once again accepting the Preview file as valid).
So, here's a summary:
Previews (X:\Lightroom Catalog Previews\) and Camera Raw Cache (X:\Lightroom Cache\) are on same, dedicated, fast drive
1:1 previews from recently-imported files load full-res at 1:1 zoom in less than 1/2 second.
Older 1:1 previews take 3-5 seconds to load full-res at 1:1 zoom, even though the previews are supposedly being loaded from still-valid 1:1 previews in the Previews folder.
I'm really tired, so i hope this makes sense. I don't see how this could be a hardware problem, because I get good performance with recently-imported images. I'm running LR3.3 on Win 7 Pro x64 with 8 GB of RAM and a 2.4 GHz Intel Core2 Quad CPU. Never had LR3 beta installed - upgraded to 3.0 from the last 2.X version. After upgrading, in response to this exact issue, I deleted my entire previews folder and rebuilt, but I continue to have the exact same problem on every shoot that I import. It's most noticeable on the large shoots, because I end up having to browse at 1:1 zoom to compare a set of similar images.
Only workaround I've found: in Windows Explorer, manually delete the Previews folder. Return to Lightroom and rebuild 1:1 previews. This forces the previews to be rebuilt for all images.
Another possible workaround I am going to experiment with: setting the Previews to "Do Not Discard", in case the defualt "Discard after 30 days" that I've used is causing or contributing to the problem. If Lightroom is actually discarding the images after 30 days but forgetting that it had discarded them when asked to re-render 1:1's, maybe setting to "Do not discard" will bandage that problem by never discarding them to begin with.
All right, I'm falling asleep at the keyboard. I'm afraid to add more details as they may become incoherent. Hope to hear some good news, as fixing this problem would make my LR3 experience so much more pleasant.
Can anyone assist with this problem?
- Tyson

function(){return A.apply(null,[this].concat($A(arguments)))}
Ian Lyons wrote:
The behaviour after previews have been around for a while (i.e. previews for unedited images) is not normal. There have been a few other reports of similar behaviour, but no real clues as to why it happens.
Yes - this is my problem. Previews should still be valid, and "Library > Previews > Render 1:1 Previews" says the images are still valid, but then Loupe rebuilds them anyways.
function(){return A.apply(null,[this].concat($A(arguments)))}
Ian Lyons wrote:
If everything was working correctly, the setting for discard shouldn't have any effect on whether the previews go stale or not. ...
My understanding is that if everything were working as intended, the "setting for discard" that I was referring to (Edit > Catalog Settings > File Handling > "Automatically Discard 1:1 Previews") should be the sole determinant of whether 1:1 previews must be rebuilt for images with unmodified settings.
For example, if I import an image and render a 1:1 preview, and if I set the "Auto Discard 1:1" setting to "30 Days", and if I make no changes to the image's settings, then I would expect that the image should render quickly (under 1/2 second) at 1:1 zoom in Loupe view for the next 30 days. On the 31st day, I would expect the image to take longer to load as a new 1:1 preview was rendered and stored, and then I would expect this new preview to be retained for another 30 days.
I would furthermore expect that the 30-day counter would be reset every time the image was re-rendered (i.e. if I go into Develop and change something).
To a certain extent, this is functioning correctly on my system. When I go to one of these "problem images" that inexplicably load slowly, returning to them subsequently is quick. I think my problem is just, as Rob suggested, that some part of Lightroom's "brain" has wacky ideas about whether an up-to-date 1:1 preview exists or not.
If I choose to "Never" automatically discard 1:1 previews (which is what I just switched to), then I should "Never" see unmodified images taking 3-5 seconds to "Load" at 1:1 zoom in Loupe.
Since I just nuked my Previews folder again last night and re-rendered 1:1's overnight for a 3000 image shoot, it might be a while before I start encountering this bug again. I will certainly post any further related experiences here and will keep checking for anyone who has further insight.
function(){return A.apply(null,[this].concat($A(arguments)))}
Ian Lyons wrote:
...we know that Lr3.4 RC fixed the manual discard bug, so, if I were you I would focus any further tests on Lr3.4RC.
Thanks for pointing this out. I will upgrade to 3.4RC - at least then I will be able to force a rebuild of previews from one shoot without having to manually delete the previews for my entire catalog. I'll no longer have to throw out all the food in the refrigerator just because something smells funny.
function(){return A.apply(null,[this].concat($A(arguments)))}
Ian Lyons wrote:
The DAT files are created at the same time as Library previews. However, they are only used in Develop module.
Yes, I definitely agree with this (although, the Cache is probably also used while rendering new previews after "Quick Develop" changes in the Library module....). I posted my observations to this effect just in case someone else wondered the same thing I did. It is clear that the DAT files get written every time a preview is rendered for RAW file. Rob, now that I'm thinking with a clearer mind, I think the only thing these Cached files are used for is if you "return" to recently rendered settings in Develop or Quick Develop - then, that particular combination of settings yields a match in the cache, and LR loads the image from the Cache into Previews and onto the screen. It is logical that the cache wouldn't help us when going to new settings, because the new settings would create a partially or completely different rendering than any other combination of settings. Adobe may be going to more advanced levels of "reusability" than this, but I'm sure this is the general state of things.
You may want to open back up write access to that Cache folder...
Thanks, Rob & Ian!
So, my question, or bug report, still remains for now - why am I biting into a bag of chips marked "Fresh" and finding them Stale? And why does it say "Paper Jam" when there is no paper jam?

Rendering: Larger Preview.... Stalls in Library Module.

I am running Lightroom 2.4 on a Windows Vista system. I have found recently that when I use the library module and attempt to zoom in on a picture in that module the full size picture on screen reverts to a highly pixalated view (presumably the embeded low res jpeg from the Nikon RAW file) and I get the message "Rendering: Larger Preview..." and nothing at all happens. If I then select the develop module the picture renders correctly, if following this I select the library module again all used to be well but now I get the message "Rendering:Develop..." and again nothing happening.
Has anyone encountered this problem and discovered a solution?

John
Thanks for the input. The problem certainly happens then but I am getting
it other times as well. I found some advice on the forum about the problem
which suggests it is associated with MS Vista's complex file access
permision system. It appears you have to give all users read write and
execute permission on all your Lightroom files. I am trying that to see if
it solves the problem.
Thanks again
Dave

LR4.4 and now LR5 does not display photos in filmstrip or Library module

I have been using LR4.4 and now upgraded to 5. My only problem has been neither versions display the photos in filmstrip or the Library module
after being imported. It displays blank frames and you can click on one in Develop and it will show the photo. But its obviously very hard to identify a specific photo if you can't see it in Library or Filmstrip.
I have read various manuals and don't see the answer as it is assumed LR does this. Nikon View NX2 on the same computer works fine.
I also wonder could there be a conflict between the Nikon View NX2 program and Lightroom.
Greg.

If you are able to import the images then the problem is not NikonTransfer or ViewNX.
This may be a bad monitor profile or incompatible video drivers.
See if there is an update for your video drivers.
Set your monitor profile to sRGB-whatever instead of one from the manufacturer that may not be compatible with LR.
You can go one step future and calibrate your display by hand using this process (for Windows 7):
http://www.sevenforums.com/tutorials/5823-display-color-calibration.html
It is better to calibrate your display with a hardware device such as a Spyder, ColorMunki or i1Display.

LR5 1:1 Previews workflow question

I don't work with 1000's of images at a time, so I build 1:1 previews on import to speed up the editing process. After editing, I do want to discard the 1:1 previews to save disk space, and I usually do it manually on the keepers and have the prefs to delete after 30 days as well. My question is: If I delete an image from the disk before I discard the 1:1 preview, does the preview data automatically get deleted from the catalog file as well? Or should I delete the 1:1 preview first before deleting the image from the disk? Does it even matter? I'm just not sure how the catalog preview data gets synced with a photo when it gets deleted. Thank you.

No, I'm afraid you're not reading my explanation right....so let me try again.
When you work in the Library module, you are seeing what are effectively jpeg previews of your raw files (assuming you are using raw of course, though the same principles apply for other file types). These can be built at several points, e.g. import or post-import, and can be built in several sizes, e.g. minimal, standard, 1:1. When you open an image in Library LR will fetch and load the appropriate preview for the size of the image display area and the zoom factor being used. If one doesn't exist for the viewing mode (e.g. zooming to 1:1 when no 1:1 previews have been pre-built), there will be a delay whilst it is built.
When working in Develop, however, those previews aren't used (except momentarily when you first select an image). Instead the raw file is converted, and the converted image "preview" is cached only, and this is what you see on your screen, and which is then updated in real-time as you move sliders. Note that this reading and conversion of the raw data happens every time you load an image into Develop (apart from maybe the last one or two images which might still be in the cache if you go back to them). In order to help speed-up this conversion, a variety of methods are used....for DNG files there is the option to build "Fast Load Data" which is written into the DNG header during initial conversion and then read when you open the file into Develop. For proprietary raw files there is the ACR cache entries, which are small files (similar to the DNG Fast Load Data) containing partly-processed raw data. This is a very simplified explanation of the process, which with LR5 is further complicated by the introduction of Smart Previews.
OK, the issue here is: when are those ACR cache entries for proprietary raw files created? As I tried to explain earlier, an off-shoot of the rendering of Standard or 1:1 Library previews is the creation of the ACR cache entry (if one doesn't already exist). However, when you open a file in Develop and Lightroom finds that there isn't already an ACR cache entry it will be created then at the same time as the full raw conversion is done. In other words, every time the actual raw data is read, be it Library preview rendering or Develop image loading, Lightroom checks for the existence of the ACR cache entry and creates it if it's not already there. Which is what I said earlier.
It logically follows, therefore, that opening a file into Develop when the ACR Cache entry isn't present would be slower than if it does already exist (though you might struggle to see the difference).
Now does that make more sense? And it doesn't contradict elie-d.

Develop settings not showing up in library module view of image

Hi there
A quick question about an issue I have not seen before. Imported a raw image .cr2 file from a Canon S95. Opened develop module and applied clarity, vibrance and sauration adjustements. Clicked back to Library module and the adjustments have not been made. Clicked back to Develop and they are there. Have tried closing LR5 and reopening - the image adjustments are still visibile in Develop, but not in Library. Any thoughts? Is this a software issue or a hardware issue (have just upgraded from LR4). Thanks in advance.

Hi Lee - I'll keep LR running for a while to see what happens. I did notice that when I did the import of the image, the thumbnails of the images from the SD card were not immediately rendered. it was possible to see the images by clicking on each one. When I had previewed each image individually, the thumbnails were visible. I suppose its possible that my hardware is running very slowly as welll.
Thanks
Chris

Develop module & library module aren't matching

When I am editing, my photos look how I want them to in the develop module, but when I switch over to the library they look different. Some photos it doesn't apply the clarity, highlights, noise reduction, or sharpening. I haven't had this problem up until a month or two ago. It used to be the same between the two modules and I no problems editing. Now it's a pain to edit because I have to switch to the Library to see what the image is really looking like, go back to develop to try and change it, but cant end up getting it to look how I want. Images look the same zoomed in, but not in normal view. I am on Windows, Lightroom 3.6. I have tried reupdating the software, downloading an older version. also updated my video driver, and nothing helped. trying to avoid reinstalling all of lightroom because I do not want to lose any previewly modified images.
first one is the view from develop. you can tell its a lot more noisey.
second picture is from the library. it's a lot more smooth.
so basically my images aren't being shown correctly. I have looked through a lot of discussions on here and no one seems to have an answer...please help me! editing should be fun, not frustrating.

Rivosyke wrote:
Thanks for the response. This appears to be more the issue with image that is exported is using the algorithm for the library module as opposed to the changes made using the develop module. The histograms are different when switching between the two modules (Library/Develop) for the same image.
Camera: D7100
Image Type: RAW
ISO: 3200
Bingo! You're using an ISO 3200 image with fairly high sharpening settings, which is going to increase noise in the image. If you view the image at 1:1 in the Develop module the noise should very visible. The Develop module and Library module 1:1 previews should both show the noise and look very close to each other. The reason why less than 1:1 Zoom previews (i.e. Fit, Fill, 1:4) and histograms look different is explained in my reply #29 under this heading MORE THAN YOU PROBABLY NEED TO KNOW (For Techno Geeks & Nerds Only). The Export module uses the same Bicubic algorithm as the Library module, which is why the Library module's preview is more accurate than the Develop module. Virtually all image editors (not just LR) use the same Bicubic resizing algorithms and will produce the same discrepancy when compared to LR's Develop module preview.
Fortunately there is a very easy solution to this issue. Unfortunately many people prefer to complain, say it is a LR "bug," and don't listen further to suggestions on "fixing" the issue. If you fall into the latter camp don't bother reading further! Sorry if this sounds crass and cynical, but I can only provide advice. Whether you believe me and try it is your decision! It works for me using five different camera models with both raw and JPEG image files.
High ISO and/or High Sharpening Preview Discrepancy Fix
1) Set Develop module to 1:1 Zoom View.
2) a. Adjust Sharpening panel settings for desired look.
b. With noisy images it's best to keep the Detail setting no higher than 35.
c. Try using the Masking slider to reduce noise in even toned areas.
3) Increase Detail panel Color setting until the color noise is barely visible.
4) If there is still some residual color noise try increasing the Color detail setting to ~80.
4) Increase the Detail panel Luminance setting until noise is barely visible or gone.
5) If the image has lost significant sharpness try increasing the Luminance Detail setting to ~80.
6) If necessary go back to steps # 2-5 and make small adjustments to the Sharpening and NR settings.
Now compare the Develop and Library previews at Fit view or better yet at 1:8, 1:4, or 1:3. They should look very close to each other with the Develop preview very slightly sharper. Full-size and reduced size Exports should look very close to what you see in the Develop module. When Resizing images don't forget to add Export Output Sharpening. When images are Resized the Output Sharpening setting has more influence on image sharpness than the LR Develop Sharpening settings. For most images the Screen Standard setting should produce crisp images. If you want more try the High setting. I generally find the Screen Low setting produces the most natural look. YMMV dependent on lens performance, camera shake, focus issues, or simply poor lighting (cloudy, foggy, etc.).

Move from library module to develop module : same photo but colors differ

When in the Library module, i see the original photo with its original color.
When i move to the Develop module, it automatically changed or lightened the colors of the same photo.
Did i set this automatic mode on ? or how can i turn off this mode ?

In library LR uses a preview, from the camera, or rendered on import. In Develop it renders from the RAW to LR's standard starting point set up by the Adobe Team. You can make it more like the Preview by applying a preset you develop to better match the look and saving it to apply to your imported images.
Don
Don Ricklin, MacBook 1.83Ghz Duo 2 Core, Pentax *ist D
http://donricklin.blogspot.com/

Develop & library module discrepancy (Lr 4.1)

I have read about similar issues floating about with previous versions of Lr, and I have now experienced it in 4.1. When moving between the develop and library modules of images with settings applied (noise reduction, lens correction profiles, etc.), the images change in color, noise reduction, highlights, contrast, etc. This occurs at both the "fit" and "fill" views and at all preview quality settings. At 1:1, the images are identical. However – and this is the bit that is most worrying – the .jpg export retains the settings, or lack thereof, in the library module. I have uninstalled Lr (using AppZapper) and reinstalled it, created a new catalog and re-edited the photos from RAW – all to no avail.
Here are some screen captures:
Develop module:
Library module:
Note specifically the stars – Ursa Major to the upper left of the fence post. The final export retains the characteristics of the library module, which annoys me, greatly. Any help?

First of all - for judging sharpness you need to look at 1:1, not screen size.
In Develop you're looking at the file itself (so that will always be the most accurate), while in Library you're looking at rendered jpeg previews. You probably already know this. But you could try to delete the Previews folder - the one that sits next to the .lrcat - and let Lightroom rebuild them.
What are your Catalog settings for Previews?
You should set a pixel size that is equal or bigger than the display. Here it's set for 2048 because the monitor is 1920 x 1200. This affects screen size previews - 1:1 previews will be generated in any case.

LR5 Fill mode preview in Library module is not sharp

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