sorry i tried to find this out but haven't seen any results. whenever i use vector paint it just disappears. i see the stroke as long as im holding down the mouse button and then it disappears as soon as i let go. i need this effect and i can't seem to fix this.
If you have the playback mode set to "Animate Strokes", the strokes will disappear as you draw them because your current time indicator defines the start of the draw-on animation. In effect, the moment you lift your pen, the time "rewinds" back to the start of the stroke.