Text morphing letter mask
Word-to-word morphs where the knife is the next letter itself: its silhouette shrinks over the current glyph, consumes it, then grows back holding the new character.
A word sits centred while giant outlined letters descend on it: for each slot, the incoming word's glyph — blown up to several times the text size — acts as a clipping shape that scales down to nothing and back up. On the way down the current letter is only visible inside the shrinking silhouette, so it is eaten away in the shape of its successor; on the way up the successor grows out of its own form.
The mask is a live text clip: the next character drawn as a clipping path at a scale that eases from large to zero to large, the glyph swap hidden at the zero crossing. The masking letter can also be stroked or filled so its shape is seen doing the work, and the same staggered sweep as the iris sibling walks the transition across the slots, with adjustable overlap and a hold on the finished word. The only thing that changed against that sibling is the mask's geometry — a letterform instead of a circle.
