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Gradient guidelines jagged

BruceCk

New Member
Joined
Dec 18, 2020
Messages
10
Lightroom Version
Lightroom Classic version: 10.1 [ 202012012023-e92d50bb ]
Operating System
  1. Windows 10
My 8 year old Chillblast desktop PC is still going strong, now running W10 Pro latest. My original Radeon 6950 2GB graphics card stopped getting driver updates some time ago, and wasn't supported for GPU acceleration in Lightroom Classic or Photoshop, but worked fine.

I recently replaced the graphics card with a used Gigabyte GeForce GTX 1060 6GB card which supports full acceleration in Lightroom Classic and PS. I haven't done much editing with it yet, but it is noticeably faster on many operations so far. The one disappointment is with the gradient tool interface. The lines go very jagged when slightly off the horizontal. If I disable GPU acceleration, it improves it, but still jagged. With my old card, I don't recall noticing any jaggies at all. It obviously doesn't affect the finished result, but annoying. I suspect it's a driver issue, so I should report it to NVIDIA. I'm using the latest 460.89 Studio Drivers as they are more stable than the Game Ready Drivers.

Just wondered if anyone else has noticed this with any other graphics cards, or if there's any setting that might affect the issue?
 

BruceCk

New Member
Joined
Dec 18, 2020
Messages
10
Here's a cropped screen dump showing the jagged guidelines.

Jagged gradient guidelines.jpg
 
Joined
Nov 27, 2013
Messages
1,727
Location
Queensland
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Intermediate
Lightroom Version
Classic
I am not sure it is really a problem, as long as other graphic functions are OK.
I also see the same 'jaggies', but never really noticed them until reading your post.
The 'outer' lines of the Gradient guides are merely a guide to the 50% gradient effect.
ScreenShot051.jpg
ScreenShot053.jpg
 

BruceCk

New Member
Joined
Dec 18, 2020
Messages
10
I am not sure it is really a problem, as long as other graphic functions are OK.
I also see the same 'jaggies', but never really noticed them until reading your post.
The 'outer' lines of the Gradient guides are merely a guide to the 50% gradient effect.
View attachment 15753 View attachment 15754
Thanks for your reply. Yes, that looks pretty similar. As I said, I realise it doesn't affect the end result. Maybe it's down to driver differences between AMD and NVIDIA? My old AMD card was 8 years old, with the last drivers dating from 2017, so its seems odd that that the newer GTX 1060 with very current drivers does this. I'll just put up with it, as the speed increase is the important difference!
 
Joined
Jun 20, 2009
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Location
Houston, TX USA
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Power User
Lightroom Version
Cloud Service
If Lightroom has defined the guide lines to be one pixel wide, any diagonal will follow the horizontal row of pixels until the X-Y position of the diagonal line jumps to the next pixel row. I have a HiDPI iMac and can not make the diagonal appear as you have under any zoom magnification. IIRC there are three places in Windows where you can affect the resolution. You might play around in Windows with these settings to see if you can affect the outcome.
I agree with I-See-Light, I'm not sure this is a problem.
 

BruceCk

New Member
Joined
Dec 18, 2020
Messages
10
If Lightroom has defined the guide lines to be one pixel wide, any diagonal will follow the horizontal row of pixels until the X-Y position of the diagonal line jumps to the next pixel row. I have a HiDPI iMac and can not make the diagonal appear as you have under any zoom magnification. IIRC there are three places in Windows where you can affect the resolution. You might play around in Windows with these settings to see if you can affect the outcome.
I agree with I-See-Light, I'm not sure this is a problem.
I suspect the guides are 2 pixels wide, and with my old card and drivers were well anti-aliased when at shallow angles, as I'm sure they are on your Mac, in the same way type is using sub pixels. I have an Eizo CS2730, 27" running at 2K - 2,560 x 1,440 scaled at 100% in Windows 10. I'm using the NVIDIA colour settings to enable 10-bit colour output, but changing back to Windows defaults doesn't change the rendering. I also tried changing the LRC setting to use Windows font rendering, but no change again. It's more of an annoyance than a problem. I'm not sure if it's caused by LRC or the NVIDIA drivers, but maybe something will change.
 
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