Every Frame Perfect

	Every Frame Perfect(tonsky.me)
	856 points by ravenical 122 days ago \| 280 comments
	tl;dr: Borrowing Wayland's "every frame is perfect" goal, the author argues UI quality should be judged by whether a screenshot at any moment—including mid-animation—still makes sense. Examples from Safari, Photos, YouTube, and Preview show common failures: desynchronized animations, snapping vs. tweening mismatches, and bizarre transition paths that betray underlying technical limitations. The takeaway: polish the in-between states, not just start and end, because sloppy animations erode user trust.
	HN Discussion: ↓Animations can legitimately use 'wrong' frames like smear frames since motion perception differs from static viewing ↓The article's premise is weakly argued and the 'every frame perfect' maxim is untenable ~Latency matters more than animation polish; animations should be minimized or skipped ~Article would be stronger with positive examples or solutions to illustrate the ideal ↑Agrees UI quality has regressed and polished in-between states matter