GoKawiilOpen-source 'Laser Graffiti' turns any wall into a laser-pointer canvas
A developer released Laser Graffiti, a Show HN project that pairs a webcam and projector so anyone can draw on a wall using a handheld laser pointer. The software tracks the laser dot and projects effects like glowing neon trails, dripping ink, or spinning 3D shapes over the strokes in real time. The creator says the project was inspired by an older video of artists laser-tagging buildings with projectors.
GoKawiil's interpretation of the reporting above, not reported fact.
The project shows how cheap, widely available hardware—a webcam, a laser pointer, and a projector—can recreate effects once reserved for elaborate art installations. It's a reminder that computer vision tools have become accessible enough for hobbyists to build interactive art experiences without specialized equipment.
- Combines a standard webcam and projector to track and visualize laser pointer movement.
- Offers multiple visual styles including neon glow, dripping ink, and 3D spinning effects.
- Draws inspiration from earlier building-scale laser graffiti art using projectors.
Anker Nebula Capsule 3 Portable Projector — To try Laser Graffiti yourself you need a projector you can aim at any wall, and Anker's Nebula Capsule is pocketable enough to haul out to a garage door or living room at night. Pair it with a webcam and a laser pointer and you've got the whole setup for painting glowing neon strokes on real surfaces.
See Anker Nebula Capsule 3 Portable Projector on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: laser.consti.de, 2026-08-29
Published there as: “Show HN: Laser Graffiti”
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