Transparent PNGs from Figma exports

SVG to PNG / JPG leaves an SVG's own background out of a transparent PNG, but it missed the way Figma writes a frame's background: a rectangular path inside a clip. It finds those now, so a Figma export comes out without its white frame.

The rule goes by shape, not colour: if the first thing the file paints is one solid rectangle over the whole page, it goes, even when it's part of your artwork. Check the preview before you download. A background inside an embedded bitmap can't be removed this way.