Particle trace border

Four hundred one-pixel sparks ride the outline of a card at 130 px/s, hue set by where they are rather than when they spawned, then peel outward and vanish. Press Dissipate and the whole ring leaves at once.

What it is

Hundreds of tiny sparks travel the outline of a panel and drift off into the dark, their colour set by where they are on the frame. Used for the moment something finishes or arrives: an upload that completed, data streaming in, a sci-fi HUD coming online. It also has a one-shot dissolve — press once and the whole ring leaves at the same time, which makes a good transition out of a loading state.

Full library — live sample, numbers, prompt and source — is for clients. I have the password

Seen in

Douyin @跟着学姐学AI · ep.34 “如何让 AI 生成五种粒子边框动效” · effect 03/05 · 0:09–0:12 (3× playback)