Created attachment 121900 [details] Capture SUMMARY STEPS TO REPRODUCE 1. Draw something with 'normal' brush blending mode. 2. Draw something over that image, on the same layer, with 'Luminosity/Shine (SAI)' brush blending mode. OBSERVED RESULT Stair-like edges appears on the first image (drawn with 'Normal' brush), as the 'Luminosity/Shine (SAI)' brush paints over it. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
What colormodel and channel depth are you using?
Also which brush, that will help us reproduce it.
Color Model : RGB/Alpha Depth : 8-bit integer/channel Profile : sRGB-elle-V2-srgbtrc.icc Just the default settings. And it's reproducible with all brush presets. It has to be on the same layer, and painted with brush blending mode, not the layer blending mode.
Created attachment 121901 [details] Screenshot with new Luminosity stroke (left) and original stroke (right) I can confirm the issue in case of semi-transparent pixels being painted over by a brush with Luminosity (SAI) mode and fully opaque pixels in that area. Does it sound like the same issue that you have? I couldn't recognize from your screenshot if the white rectangles are only in the previously semi-transparent areas or not. Can you please confirm/deny this?
Created attachment 121904 [details] Capture 2 Maybe? I can't clarify from your screenshot... but it looks like the same issue. Here's a new capture using airbrush and a low-opacity brush.
Probably related info here: https://bugs.kde.org/show_bug.cgi?id=414386#c3
Still happens in 5.0 alpha. It seems that it happens only at the edge of the layer where it becomes transparent. Which means it doesn't happen if you test it by painting on, for instance, white 100% layer. Also it doesn't happen if you paint with sai blending mode over preexisting painting painted with sai blending mode.
I found out that this also happens when you merge the layers. If you merge an upper layer(SAI luminosity) to the bottom layer(Normal), it changes from smooth edges to blocky edges.
(In reply to acc4commissions from comment #8) > I found out that this also happens when you merge the layers. If you merge > an upper layer(SAI luminosity) to the bottom layer(Normal), it changes from > smooth edges to blocky edges. And the same happens when they are just simply in a group layer.
A possibly relevant merge request was started @ https://invent.kde.org/graphics/krita/-/merge_requests/1399