The mirror that dances with light
Hey 👋 — today's mix leans quietly technical after yesterday's AI parade: a five-metre spinning mirror sculpture, a decades-old algorithm getting a speed boost, and two sobering looks at what "free" AI tooling actually costs you.
The Helix – A kinetic system of mirrored sculpture, light and sound
A five-metre column of mirrored glass rotates slowly at the centre of this installation, catching light from four synchronized projectors while quadraphonic sound tracks its movement around the room. It's the kind of piece that's hard to summarize in a single photo — the whole point is standing inside the loop as light, reflection, and audio chase each other around a fixed axis. CreativeApplications' write-up walks through how the mechanical and audiovisual systems were built to stay locked together, which is the unglamorous engineering that makes the glamorous part possible (via CreativeApplications).
Poisson disk sampling
If you've ever scattered procedural trees, stars, or stipple dots and had them clump awkwardly instead of spreading naturally, this is the algorithm you needed. The post walks through Robert Bridson's 2007 method for placing random points with guaranteed minimum spacing, then layers in the author's own tricks for speeding up convergence in 2D and beyond — genuinely useful if generative placement is part of your toolkit (via HN discussion).
WebLLM: high-performance in-browser LLM inference engine
An open-source engine that runs LLMs entirely in the browser via WebGPU, no server round-trip required — the kind of hacker-friendly project that turns "run it locally" into "run it in a tab" (via HN discussion).
The MCP tax: what each server costs before your first prompt
Staying with the theme of things that quietly cost more than advertised: this study measures the hidden context-token overhead of installing MCP servers and finds schema sizes swinging more than 30x between servers before you've typed a single prompt. It also notes Claude Code now defers that cost to first tool use rather than charging it at session start — a small change that hides the bill rather than shrinking it.
I don't have a smartphone…
Ploum's essay isn't really about phones — it's about how many everyday interactions, from public toilets to buying a car, now quietly assume you're carrying one, connected and app-ready. Refusing the device turns out to be a decent way to map all the infrastructure that's been built on top of an assumption nobody voted on (via Lobsters discussion).
Quick hits
- "greets" to the Amiga demoscene in a 1996 PlayStation game — a hidden nod from one scene to another, coded straight into the ROM.
- Three sites made 215,128 "best software" pages for AI. Perplexity cites them — SEO spam, but make it a citation network.
- Show HN: The Simpsons Hit and Run Revamped — an open-source revival of the beloved PS2 romp.
- Fable 5.1 world modeling — another entrant in the increasingly crowded world-model race.
- Commodore 64 released September 1, 1982 — the breadbox turns 44, still humming in someone's closet.
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