Slow brush smoothing OpenToonz 1.6

[ot-enjoyer]

Description

In OpenToonz 1.6 the brush smoothing works slower and basically worse in comparison to 1.5, which makes it much more difficult if not almost impossible to draw by mouse.

Changing brush smoothing is never mentioned in any release notes, so I suppose it's a bug?

Steps to Reproduce

Trying to draw small shapes by mouse in both versions.

Expected Behavior

Smoothing working the way it did in 1.5.

Screenshots, Video & Crash Logs

1.5 toonz raster brush with smoothing set on 50

1.5.mp4

1.6 toonz raster brush with smoothing set on 25

1.6.mp4

OpenToonz Version

1.6

OpenToonz Version Information

built Apr 4 2022 10:30:14

Operating System

Windows

GPU

NVIDIA

Graphics Tablet

No response

[ghost]

Could be related to this #3895

[ot-enjoyer]

Could be related to this #3895

I downloaded the version that is prior to pr, it appears that this smoothing flaw did appear after it.