Embodiments involve reducing collision-based defects in motion-stylizations. For example, a device obtains facial landmark data from video data. The facial landmark data includes a first trajectory traveled by a first point tracking one or more facial features, and a second trajectory traveled by a second point tracking one or more facial features. The device applies a motion-stylization to the facial landmark data that causes a first change to one or more of the first trajectory and the second trajectory. The device also identifies a new collision between the first and second points that is introduced by the first change. The device applies a modified stylization to the facial landmark data that causes a second change to one or more of the first trajectory and the second trajectory. If the new collision is removed by the second change, the device outputs the facial landmark data with the modified stylization applied.