Make a subject look like it is breaking apart and blowing away. The effect finds edges in each frame, lifts a share of their pixels, and scatters them in one direction, the dust-trail look of disintegration sequences.
Edge threshold
Edge Threshold decides which edges qualify. High values pick only strong silhouettes, such as a figure against sky. Lower values let clothing, hair, and background texture fragment too, which spreads particles over the whole frame.
Direction and space
Particles need empty space to travel into. Frame the subject on the side opposite the direction, with sky or a plain wall ahead of it, and the drift reads as wind. Particles crossing a busy background disappear into it.
Particles in motion
The particle layout is redrawn on every frame, so the breakup flickers like fine dust. It follows the subject as it moves because the edges are found again in each frame. Lower Particle Amount for a subtle shimmer at the edges only.