I emphasize freehand stroke because it is true that we have the ability draw a perfect circle or ellipse with the Ellipse and Circle tools (and Guides) that currently exist in TVPaint, but those ellipses necessarily look mechanical.

Is something like this possible with TVPaint ? you can almost do this with the TVPaint Line Smoothing, but current version of Line Smoothing does not have the magnetic 'snap to' function where the end of the freehand stroke snaps to the start of the freehand troke. This seems to me like it might be related to whatever it is that makes Line Smoothing work. With Predictive Stroke it 'snaps' the end of your line to the starting point of the line, so you get a more or less perfect freehand ellipse or circle. Sometimes even when you try to be very accurate drawing a freehand circle or ellipse you will miss connecting the end of the line to the start of the line. This Predictive Stroke function is especially useful for drawing freehand Circles/Ovals/Ellipses. In Autodesk Sketchbook Pro they have a function called ' Predictive Stroke'.

Autodesk sketchbook pro animation