Created attachment 157228 [details] Example for lines drown with kolourpaint SUMMARY *** NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** STEPS TO REPRODUCE 1. select line drawing tool 2. select the minimum width (one pixel) 3. ensure the color black (#000000) is selected 4. draw a line longer than one pixel OBSERVED RESULT The line is some kind of light gray. EXPECTED RESULT The line should be black. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: ubuntu 18.04.6 LTS (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
What you see is called "Anti aliased drawing" so that non horizontal/vertical lines look smoother. You can disable this via the settings menu