Issue Summary

When i use the shift modifier and my stylus to modify the brush size, the program lags. Especially when the size becomes large. It's also finnicky. Like holding shift and simply tapping somewhere can cause the size to jump to 1 or 200, usually dependent on the stylus movement hovering over the screen before the tap. If i try changing the size using stylus by dragging on somewhere outside the canvas (when i just want to draw on infinite canvas like Milton (another painting program) does), it doesn't work. If I hold shift modifier and just scribble my stylus, it can cause enough lag to crash the program. (An option for max brush size limit would be nice.)

Actual Results

Causes lag and/or crash.

Expected Results

Should be smooth. In most other programs I've tried (Milton, Krita), changing the size dynamically with stylus doesn't lag.

Video or Image Reference

Steps to reproduce

Hold shift and drag the stylus to modify brush size.

System Information

• Pencil2D Version:
  0.6.6

• Operating System:
  Windows 10 Pro

• RAM Size:
  4GB

• Graphics Tablet:
  Surface Pro