Lightroom: Display incorrect during gradient creation

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  • Updated 7 years ago
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This conversation has been merged. Please reference the main conversation: Lightroom 4.3: Rendering issues: pixelized image while making adjustments or brushing

I've noticed that the image display is temporarily incorrect when 'drawing out' a gradient with the gradient tool. Once the gradient end points are set it then redraws the image with the correct color. It's as it Lightroom doesn't use the display profile when drawing out the gradient tool. I've occasionally noticed with with the adjustment brush as well.

I've seen this is in LR 1-4 when using an external display on Mac OS versions 10.4-10.8. And FWIW, it's especially noticeable when connected to a projector.
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Scott Martin

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Posted 7 years ago

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Dorin Nicolaescu-Musteață, Champion

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How exactly is it incorrect? Can you post a screenshot with the image in both states?

Do you see anything similar when using the brush?

Is it LR 4.3?

Might be related: http://feedback.photoshop.com/photosh...
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Scott Martin

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I wish I was using my projector this week so I could take a really good screenshot. A screen video might be better at illustrating this rather than a screen grab. The difference isn't as dramatic on my current rMBP display but I do see it. Yes, I do see it with the brush as well. When using the brush there are big square areas around the brush that momentarily look incorrect (a little darker or off color) until you finish the brush stroke. This is the kind of thing that most wouldn't notice, and it's much worse on some images... For some reason it's much worse when connected to a projector.

I typically use custom display profiles from XRite but sometime resort to a generic sRGB profile for projectors. When I help my workshop students on their own laptops (Mac and PC) I see this problem as well. Again it's just so much worse on a projector - it's easy to overlook on a regular display even though it's there.

I am a PhotoshopWorld presenter and not only am I concerned about my own presentations, I'm seeing the same effect when I view other's presentations including adobe's own presenters. Seems like something Adobe would want to improve upon if its possible.

I seen this for years since LR1 across several MacBookPro's and projectors and monitors. I'm surprised you haven't seen it. Here's let's walk through it:

Take an image with lots of custom adjustments (including WC, exposure, highlights,shadows, clarity, a crop, post crop vignetting, etc). Just for good measure put a few gradient's and Brush adjustments on there as well. Make a brush stroke with a bunch of adjustments over the image and look for big blocky square areas around the brush stroke. Still holding the mouse button down, take a mental picture of the image. Then let go of the mouse button (finishing the brushstroke) and watch the image change. A little. LR is surely using some kind of quick approximate rendering during brushstrokes and gradients and then applies a final, more accurate rendering when the operation is complete. Do this ona projector if possible.

What I don't know is whey it looks so god-awful on many projectors. Sorry I can't send a screen grab of that (at least for a few weeks). I'm not sure if I can even make a screen grab of this since the screen is re-drawn when the stroke or operation is completed.