Scatter image edges
The processor finds horizontal and vertical luminance changes, then selects a seeded subset of those edge pixels. Selected pixels lose opacity at the source and reappear farther along the chosen direction, so the subject appears to break apart and drift.
Particle amount controls selection density. Travel distance is a percentage of the shorter image side, so a 20% setting produces the same composition at preview and export sizes. Edge threshold decides whether the effect follows only strong silhouettes or also catches texture.
Shape the breakup
Start with a high threshold to isolate the outline of a subject. Lower it when clothing, hair, or surface texture should also fragment. Direction matters as much as amount: particles blowing into open sky read as wind, while particles crossing a busy background disappear into it.
Large travel distances need spare canvas space in the chosen direction, because particles outside the original bounds are clipped.
Example: portrait dissolving to the right
Place the subject on the left third of the frame, set Direction to Right, Travel distance near 25, and Edge threshold around 60 so only the body outline qualifies. Then lower Amount until the face stays solid and the trailing shoulder carries most of the breakup. If hair should fragment too, drop the threshold by 10 or 15 rather than raising the amount.
Cycle through a few seeds at those settings. Placement changes with each seed, and one arrangement will usually keep the eyes clean while spreading particles where the frame can afford them.
Transparency in the output
Displaced pixels leave partially transparent gaps behind, which is why the export is always PNG regardless of the source format. Those gaps are the point: layered over a darker background in another editor, the dissolved edge shows whatever sits beneath it. Flattening the PNG onto white in a later step fills the gaps and flattens the effect with them.