Please help.
While using Move brush, I have strange visibility artifacts, when rotating viewport, it disappers of course.
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been reported over 9000 times, seems to happen on low poly the most, try turning off Preferences : Performance : multidraw and multirender. sometimes that helps, i’m sure someone will pipe in about video drivers etc etc, eventually its just one of ZB’s quirks you learn to deal with.
Turning off multidraw\multirender doesn’t help 
I’ve not always found that they help. I’d add the canvas “clear” button (from the color menu) to just wipe 'em off when they get too thick. 
-K
The trouble is that I should always do that steps to clear viewport, and the work slow down. But it is real for low-poly models, hi-poly is OK. But it is very “strange” bug.