dev.jeffpelton.com

Hollow Golf

2026-09-27T00:00:00.000Z

Hollow Golf takes the world from Hollow Light and puts a mini golf course on the inside of it. Gravity pulls out, toward the ground under your feet, so every fairway curves up into the sky, the Sun hangs in the middle, and the far side of the course is over your head. Nine holes across four themed worlds: a garden, a glacier, rooftops, and floating islands around a crystal star core. The last hole's green is on the other side of the world, and the only way there is over the Sun.

Drag back from the ball to aim and shoot; putter, wedge and a "sky driver" that lofts the ball across the middle of the world. It's three.js with a fixed-step 240 Hz physics sim on the sphere, so shots are deterministic. The promo below uses real shots found by a search script, including the hole-in-one on hole 9, rendered frame by frame from the game's own engine.

Hollow Light

2026-09-27T00:00:00.000Z

What if we live on the inside of the Earth? The "cell" cosmology says the ground curves up around us, the Sun hangs in the middle, and the stars are a tiny ball at the centre. The obvious objection: then you'd look up and see Australia. The answer the model gives is that light bends. Hollow Light lets you turn that bend up and down and see what the world would look like.

Bend it to exactly 1 and something neat happens: every sightline becomes an arc through the centre, and the sky from the ground is identical to the one on an ordinary globe. Sunrises, sunsets, the Moon's phases and the stars come out right, computed from real ephemerides for any date. Turn it to 0 and the rest of the planet hangs over your head. The left view shows the cell from outside with the sunlight's actual paths; the right is what you'd see standing there. WASD walks you around the inside of the world.

It's plain three.js with a GPU ray-marcher for the "your eyes" view: each pixel's light is traced along its curved path until it hits the shell, the Sun, the Moon or the star core. The promo below is rendered straight from the simulator, frame by frame, with a synthesized soundtrack.

Lightbender

2026-09-27T00:00:00.000Z

Lightbender is a puzzle game set in the same hollow world as Hollow Light, drawn as a slice through the cell: the rim is the ground, the Sun floats inside, and light curves toward the middle. You can't move the world. You can only change how the light bends, with a dial for the bend itself and a handful of tools: lenses that pull or push light, mirrors, shades, and patches of hot ground that throw up a mirage.

Each level asks for light in some places and darkness in others: a village that needs the sunrise, a dragon that must stay asleep in the dark, two towers that have to see each other across the world. Later worlds make the Sun move through the day, give it Cyrus Teed's one-sided face, or send a moon across to cast an eclipse. There are 17 levels, and every one is checked by a solver so the three-star target is always reachable.

The demo above is a real play-through of four levels, recorded in Chrome.

A place for experiments

2026-09-26T00:00:00.000Z

I keep starting small projects: games, visual toys, one-page tools. Most never needed a server, but each one still needed somewhere to live before anyone could try it.

Now they live here. Any project that builds to static files can run

curl -fsSL https://dev.jeffpelton.com/_site/devsite.cjs | node - publish

and it's live at dev.jeffpelton.com/<name>/ within a minute, listed on the front page unless it asks not to be. It's an S3 bucket behind CloudFront, so it costs close to nothing and needs no babysitting.

The details are on the hosting page.