AF-Photo flickers when dodging and burning

[pfi]

Observed on AF-Photo V2.1 and 2.2 beta.

I have just bought a Dell U2723QE monitor (4K 3840x2160, 60Hz refresh) and use it as my primary monitor together with an Asus 27" monitor (2560x1440, 60Hz).  I intend to use the Dell monitor for image editing, as it is meant to be very color accurate.

The Dell shows a lot of flickering when dodging and burning in AF-Photo (see attached captures).  The happens as soon as the cursor moves or dodging is applied and it effects whole sections (like a square part if the screen that the cursor is in). At the same time those sections become unsharp while the cursor is being moved or dodging is applied.

This only happens on the Dell display, i. e. not on the Asus.  Also this only happens in AF-Photo and not in my other image editors.

Enabling/disabling OpenCL does not make a difference. I am not familiar with graphic card settings (NVIDIA T600).

This flickering makes dodging, burning and sponging (maybe others?) quite difficult to work with and I would appreciate any advice to get rid of the problem.

[lepr]

The Dell monitor will be classed as a 'Retina' pixel density device by Affinity and so the document view rendering is affected by the Retina Rendering control in the performance settings of the app.

The flickering should stop if you change that control from the default 'Automatic' to 'High Quality' then relaunch the app.

(The Asus monitor won't be affected because it is not classed as a 'Retina' device.)

 

[pfi]

Thanks for the reply. My Settings-Performance interface looks different and the Retina Rendering only gives me the options: NVIDIAT600 (default), Intel UHD graphics and WARP.  I assume these are hardware based options.  None of the other options make any difference.

[lepr]

9 minutes ago, pfi said:

My Settings-Performance interface looks different and the Retina Rendering only gives me the options: NVIDIAT600 (default), Intel UHD graphics and WARP. 

It's slightly different because you have Windows and I have macOS.

Looking at your screenshot right now, the options you describe are in the Renderer control, not the Retina Rendering control that I told you to change.

Immediately under that in your screenshot is Retina Rendering: Automatic (Best).

That's the one I clearly told you to change from Automatic to High Quality. I even posted an image to make sure you couldn't miss it!

 

[v_kyr]

[pfi]

Sorry guys, I have not had a coffee and I clearly had a blank moment. Yes, the 'high quality' setting works fine.  I really appreciate your help (and patience!) - Thank you.