Created attachment 133015 [details] Red line is drawn in Krita, blue in SAI, and black in Photoshop. lines are drawn from bottom-left. SUMMARY In Paintool SAI & Photoshop brushes can easily draw heavily-started lines, while in krita the brushes currently can't. STEPS TO REPRODUCE 1. Enable pressure sensor of Size in simple/pixel engine brushes. 2. draw lines with max pressure on start and relax gradually. 3. Repeat step 2 in PaintTool SAI 2 and Photoshop. OBSERVED RESULT See attachment. EXPECTED RESULT See attachment. SOFTWARE/OS VERSIONS Windows: 20H2 x64 Qt Version: 5.12.9 ADDITIONAL INFORMATION Using Wacom PTH660 tablet.
What lines are made depends on the brush preset, the brush engine, the tablet response curve set in the application (settings->configure krita->tablet), the settings in the tablet driver's configuration panel. This is all very tweakable, but there is no guarantee or reason why unrelated brushes in unrelated applications actually should give the same results, though you certainly can create brush presets that feel similar, so I'm afraid that this just isn't a bug.
(In reply to Boudewijn Rempt from comment #1) > What lines are made depends on the brush preset, the brush engine, the > tablet response curve set in the application (settings->configure > krita->tablet), the settings in the tablet driver's configuration panel. > This is all very tweakable, but there is no guarantee or reason why > unrelated brushes in unrelated applications actually should give the same > results, though you certainly can create brush presets that feel similar, so > I'm afraid that this just isn't a bug. I make further research and post it on r/krita, and I checked other painting post, I didn't see no one have lines lines like I described. In PS & SAI it is normal. https://www.reddit.com/r/krita/comments/johpqa/problem_with_pen_pressure_brushes/
I'm closing this bug because careful reading of the reddit thread provided shows that the problem was with stabilization (when turned off, the stroke was as expected). If you stabilize sensors, I'd assume that the effect would be like on the screenshot. Even if we were to discuss how stabilization works for sensors and whatnot, that would require a discussion on krita-artists.org first, because it's a wish and there might be different opinions on that.