Created attachment 146217 [details] Screenshot of the bug. SUMMARY *** When creating a Filter Layer, like Color Balance or Levels, and then changing that Filter Layer's opacity from 100% to 75% (for example), an ugly grid appears. This grid isn't apparent when the Filter Layer is set to 100% opacity. The grid's intensity multiples with the number of Filter Layers you have (if those Filter Layers are also set to an opacity level below 100%). This problem doesn't exist on Android or Windows but I've been able to recreate it with everything I've worked on in Manjaro Linux using Krita 5.0.2 from the official repositories as well as the app image and the flatpak variants. STEPS TO REPRODUCE 1. Create a Color Balance Filter Layer and adjust the values. 2. Reduce the Filter Layer's opacity from 100% to 50% 3. That should do it. OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Manjaro, Gnome 41.3, nVidia (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION I've tried: -Turning on/off Canvas Acceleration in Display Settings -Altering the Transparency Checkerboard in Display Settings -Uninstall/Reinstalling -Krita versions from the Official Repository, Flatpak, AUR and App Image -Opening my files in Android and Windows (where the grid problem is not present).
Can confirm, what's proly going on is that the filter layers work by creating tiles, and somehow these tiles have gotten oversized, leading to 'banding' when the filter layer is semi-opaque. The overshoot seems to be 8 pixels here. I wonder if this somehow relates to the attempts to get filters that 'wrap around' (like blur and the like) to work, though, it also affects those...
Remove triaged keyword from CONFIRMED bugs