https://bugs.kde.org/show_bug.cgi?id=328537
--- Comment #7 from Dmitry Kazakov <dimul...@gmail.com> --- Yes, the bug is actually in the stroker in Qt. When offsetting the cure it doesn't handle the case that the curvature radius of the spline can be smaller than the offset value. That causes the offset line to start retrograde motion and self-intersect, which gives the described effect. The same bug is present in Gimp and Inkscape. The paper which at least mentions the problem: https://pdfs.semanticscholar.org/9679/e1295261d77cd9ef514b9c875953fe1d2c80.pdf -- You are receiving this mail because: You are watching all bug changes.