Golden Sparks on Transparency
A 3-second burst of golden sparks on a real transparent background, ready to lay over a product shot or footage.
Wan Alpha makes video with a real alpha channel: the element is drawn on transparency rather than cut out of a background afterwards, so sparks, embers and glow keep their soft edges. Golden Sparks on Transparency bursts from a bright centre and drifts down; laid over a product still, the bottle shows through everywhere except the sparks and their glow, with no black matte or halo.
To make your own, describe one element and its motion and say the background is transparent. You get a VP9 WebM with alpha for editors that read it, and the same frames as RGBA PNGs for frame-exact compositing.