Created attachment 153396 [details] Isotropic visual guide 01 STEPS TO REPRODUCE 1. Start Krita 2. Select the Basic 2 Opacity 3. Open the brush editor 4. Disable the opacitiy and flow and rotation options. 5. Disable Auto spacing. Put normal spacing to 1.0, Ratio 0.25 and Angle 90º 6. Activate "Isotropic" in Spacing Option, Disable enable pen settings option and see how it changes. EXPECTED RESULT Isotropic spacing must to keep the blank space (arround the brush tip) that we achieve with Ratio change. And if isotropic is disabled the spacing between dabs is 1.0 so they are touching them in the edges.(It deppends on Fade parameter.) OBSERVED RESULT Now go to predefined brush and select "chisel Eroded" brushtip. (works with others too) Disable Auto spacing. Put normal spacing to 1.0 Change size to 40px to see it in the same scale as Auto brush. Activate "Isotropic" in Spacing Option if it is not active, Disable enable pen settings option and see how it changes. Isotropic spacing must to keep the blank space (arround the brush tip) But now we need to reduce the spacing to see how the brushtips are touching them to arround 0.5 Try the same with and RGBA brushtip and reacts as Auto brushtips. As i talked with Dmitry i thought, that Krita was understanding white pixels as part of the brushtip, But he reviewed the code in master iirw so i am reporting it. (My tests are in 5.1.1) I put in normal severity because i don't know if i decide that. I hope this helps, because for flat brushes it would speed up them. Thanks for reading it. SOFTWARE/OS VERSIONS Windows: 10 macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION Qt Version (compiled): 5.12.12 Version (loaded): 5.12.12 OS Information Build ABI: x86_64-little_endian-llp64 Build CPU: x86_64 CPU: x86_64 Kernel Type: winnt Kernel Version: 10.0.19043 Pretty Productname: Windows 10 (10.0) Product Type: windows Product Version: 10