Try using - Block_wet_tilt brush and paint strokes with increasing opacity. This is what happens https://forum.kde.org/viewtopic.php?f=276&t=126575#p335538 There is unwanted jitter in hue and saturation Reproducible: Always
Created attachment 92839 [details] Kra file showing an 8bit and 16bit layer with the same colour smudged over it. Can confirm this bug, it's a rounding error, but the question is where we make it.
Created attachment 92840 [details] The brush used to make that file.
Git commit cc19c756f1be1d078ea50369de0bbbd6fb61698c by Dmitry Kazakov. Committed on 10/01/2018 at 12:42. Pushed by dkazakov into branch 'master'. 2nd try of fixing color fluctuations in colorsmudge-dulling brushes Now the colorsmudge brush does all the blending in the high bit-depth colorspace. The patch introduces a special wrapper (KisPrecisePaintDeviceWrapper) that ensures a proper color space is used when needed. See the apidox in KisPrecisePaintDeviceWrapper.h. NOTE: this patch fixes **both** dulling and smearing modes! Test Plan: Needs to be tested: 1) Colorsmudge brushes in Dulling mode with Color Rate option enabled 2) Smudge Radius enabled or disabled: both should work correctly 3) Opacity option should work correctly 4) Overlay mode? Reviewers: #krita Differential Revision: https://phabricator.kde.org/D9686 M +1 -0 libs/image/CMakeLists.txt A +165 -0 libs/image/KisPrecisePaintDeviceWrapper.cpp [License: GPL (v2+)] A +141 -0 libs/image/KisPrecisePaintDeviceWrapper.h [License: GPL (v2+)] M +1 -1 libs/image/kis_paint_device.cc M +47 -0 libs/image/kis_painter.cc M +15 -2 libs/image/kis_painter.h M +117 -0 libs/pigment/KoColor.cpp M +45 -1 libs/pigment/KoColor.h M +69 -32 plugins/paintops/colorsmudge/kis_colorsmudgeop.cpp M +10 -3 plugins/paintops/colorsmudge/kis_colorsmudgeop.h M +20 -11 plugins/paintops/colorsmudge/kis_smudge_radius_option.cpp M +3 -1 plugins/paintops/colorsmudge/kis_smudge_radius_option.h https://commits.kde.org/krita/cc19c756f1be1d078ea50369de0bbbd6fb61698c