brush strokes appear as string of tear drop shapes instead of solid stroke

opened toonboom recently and tried to draw, only to find that instead of coming out as an actual brush stroke i keep getting these teardrop shapes. if i go more slowly, this doesn’t happen and the brushes look normal. so i suspect its some kind of performance issue? but not sure. example attached.

im running
toonboom harmony advanced
windows 10
ugee tablet monitor

never had any problems with this before yesterday.
any help/solutions are appreciated, i’ve got projects to finish! thanks!


Can you please update your graphic card drivers? That looks like an OpenGL issue.

You can also create a profile for your Harmony to take advantage if your Graphic Card, I will share a video that I did:


Best Regards,

Technical Support Specialist
Toon Boom Animation