Created attachment 68697 [details] Screenshot 1) Select Filter Op 2) Select Predefined Brush mask 3) Select Invert filter 4) Paint You'll see black squares appearing randomly on a canvas.
Works here.
Doesn't happen here eidter, but the effect is still quite strange, since on the first pass, the filter op seems to paint, only on the second pass in the same stroke the filter inverts.
I can reproduce easily, but "black squares" is the wrong description: the filter applies to the entire bounding rect of the brush, not limited by the mask. See screenshot of painting invert with the a3 dirty spot brush.
Created attachment 69181 [details] result of painting invert filter
Git commit bafbe74c784b0c7da1a693fd86a50dd8ab3f016b by Dmitry Kazakov. Committed on 03/03/2012 at 16:34. Pushed by dkazakov into branch 'master'. Fixed Pipe Brush mask generation The wrong check was added due to non-obvious naming. Fixed both. M +6 -6 krita/plugins/paintops/libbrush/kis_imagepipe_brush.cpp http://commits.kde.org/calligra/bafbe74c784b0c7da1a693fd86a50dd8ab3f016b
Hm, no, this isn't fixed yet. See attachment.
Created attachment 69298 [details] shows artefacts still happen
This is a different bug: https://bugs.kde.org/show_bug.cgi?id=295464
Git commit c5e3c44925b5479be15c13e22cc424600df36952 by Dmitry Kazakov. Committed on 03/03/2012 at 16:34. Pushed by dkazakov into branch 'calligra/2.4'. Fixed Pipe Brush mask generation The wrong check was added due to non-obvious naming. Fixed both. M +6 -6 krita/plugins/paintops/libbrush/kis_imagepipe_brush.cpp http://commits.kde.org/calligra/c5e3c44925b5479be15c13e22cc424600df36952