Well, it looks to me that the lines are Z-fighting with the lines from Onion Skinning.
Turning the Opacity of the Onion lines to 0 doesn’t help with the Z=fighting, unfortunately. Setting the number of Keyframes in the Onion Skinning to 0 doesn’t help either; it just ‘hides’ them.Even turning them off in the Overlays doesn’t help.
Also, the last drawn Vertex (in a certain Keyframe) is double, but the earlier ones are not; that has probably also to do with the Onion Skinning.
I’m not being much of a help, I know. You should ask Paul Caggegi…
