P: Artefacts when using shadows, clarity and image warp (lens corrections)

The 'render using Lightroom' option worked. Thank you for your help. I just spent a couple weeks cloning that crap out of 200 photos. That was a real pain. Again thanks for taking the time to help me.

This bug has been introduced in ACR 6.7 and the release candidates of 7.1 and LR 4.1. The bug has been subsequently fixed in 7.1/4.1 final, but will never be solved in 6.7.

So, you only option is to render using Lightroom when prompted. If you don't get this prompt when hitting Ctrl+E, reset your warning suppressions in Prefs->General->Reste all warning dialogs.

This issue is going to be hard to explain but I will give it a shot. I recently upgraded to Lightroom 4.3. After making adjustments to a photograph in Lightroom, I press CMD+E to open the photo in Photoshop. But when the photo opens, it has weird artifacts along the edges of the subjects within the photo. So, alternatively, I export the photo to my desktop and then open it with Photoshop. When it opens, the artifacts aren't there. The artifacts are only there when I use the 'Photo>Edit In' command within Lightroom. When viewing the photos in Lightroom, the artifacts are not present. I am using Lightroom 4.3, Camera Raw 7.3, and Photoshop CS5.1. The artifacts can be seen on the sleeve in the uploaded photo..

When activating lens profile correction and when i change my process from 2010 to 2012 and using the shadow recovery slider above +20 :
the black area close to white area are becoming jagged and stripped whithin the black area around the white
eg .A white texte on a black surface

My Camera is Nikon, and this apend for any camera i had

Hi Todd,

Indeed this is something we're considering. Thanks.

Eric

Unfortunately, such a progressive system would not help this case.

Thank you Eric, I understand and appreciate the tradeoff concerning maintaining LR's real-time operating performance (screen image building), but what about output image building?

Would it be possible to incorporate changes for better imaging during Export, Edit In, Print, and other output operations? I think most users wouldn't mind waiting a bit longer for their final output to be processed, especially to achieve the best results. I know this may cause complaints about screen imaging not matching the output, but we're talking very small artifacts. IMHO that is also a justifiable limitation of current technology “tradeoff" that most users would accept.

This is just a suggestion for improving an already outstanding product, my compliments to you and the rest of the LR team.

The "on the fly" part is why we really need a progressive rendering system, so we don't have to make those sorts of trades if we don't want to. We used to have "pixel doubling" and detail panel settings applied later, but these have been removed. I'd like to see them back with a slider for the user to decide just how "on the fly" the renderings have to be.

Dorin, generally this can happen with strong edges (e.g., dark branches against a bright sky), when used in conjunction with strong settings of Highlights, Shadows, and/or Clarity. The tone mapping methods behind these controls are edge-aware in the sense that they try to minimize halos across strong edges, as you'd expect to see if you were to try doing local dodging/burning with a brush. The underlying masking technology to minimize these halos is very complex and expensive, so we had to make some tradeoffs to get performance to a reasonable level in an on-the-fly, parametric editing system.

Can you elaborate a bit, please? Under what circumstances do these limitations arise? Generally, I don't see these artefacts. Is this when Highlights, Shadows, or Clarity are pushed to far, when there's purple fringing on the edge or a combination of both?