The pack
deformCurl
function deformCurl(): Pack<{}>
Deformer curl: the bottom-right corner of the sprite rolls over a cylinder of radius amount whose fold front
advances up the diagonal and back on the t clock — a page turn, with a lit roll and a contact shadow.
deform: { kind: 'curl', amount: 18, speed: 0.22 }. Requires a backend that draws sprites2d.


