It looks like the rings that spread after a pebble lands in still water: circular bands radiate from a center.
Move the origin with `center` and set ring spacing with `frequency` from 1–80. `thickness` from 0–1 changes band width, `softness` from 0–3 feathers its edges, and `speed` from -5–5 controls motion direction and pace.
Ripples draws a pattern; it does not refract an image beneath it. Use it as decoration over a dark background, and check that its generated background color does not cover a photo when layering it there.
When to use
Use it for a water or wave inspired background, a decorative click focus, or a hero that needs slow circular motion. Avoid it when you need to distort a photo or simulate a real water surface.