slop.boutique

A lab for computation and intelligence as material and medium. Run by Manuel and Ramon.

041 · 23 October 2026 · slides · shaders

Lantern Slide Studio

A slide studio where the deck is a JavaScript script, every slide is a GLSL shader that gets its words as a texture, and every transition is a shader too.

Previewin your browser
Four title slides from the presets: Say it louder, Cathedrals of the void, Fractal reality and Draw a card

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A slide studio where the deck is a script and every slide is a shader. deck.js runs top to bottom and returns a deck. Each slide is a GLSL fragment shader that gets the slide's words as a texture it can sample, bend, split and burn, and each move between slides is a shader over the two live slides. The deck rebuilds as you type.

  • Write the deck in JavaScript: deck() and d.slide() with eight layouts (title, center, statement, shout, bullets, quote, code, blank), free type anywhere, 13 palettes, any Google Font, and loops that generate slides.
  • Light it with GLSL: slide shaders read the words through typeAt and inkAt, the pointer through iMouse, and the last frame through prev() for feedback. @param lines become sliders in the slide panel.
  • Transitions as shaders: slam, rip, glitch, apparition, iris, burn, letters, zoom, fold, lens and dissolve. Each must show exactly the old slide at t = 0 and exactly the new one at t = 1, and the Transition card checks that. Hold or drag on the stage to stop or scrub a transition.
  • Present: full screen, step through bullets with the arrow keys, and show speaker notes with N.
  • Export: a standalone player as one HTML file, a PNG snapshot of the current slide, or the project as JSON to open again later. A console takes commands such as studio.go(3) and studio.param('punch', 2).
  • Ask the agent: with the hosted runtime, Claude can write or change a deck for you.

Eleven presets come with it: Phantasmagoria (a tour that ends with one slide per transition), Plain talk, Shader school (eight lessons), Blank, Black Iron Prison (after Philip K. Dick), Cathedrals of the void (after Philippe Druillet), Rings of Saturn, Fractal reality, Recursive cosmotechnics, Swiss riot and Tarot.

It is a close cousin of Lattice Deck, another programmable presentation workbench. In Lantern every slide and every transition is a GLSL shader over the slide's own typography.

The full studio: deck.js on the left, the first Phantasmagoria slide on the stage with the slide strip below, and the slide panel with shader sliders, palette and notes
The full studio: deck.js on the left, the first Phantasmagoria slide on the stage with the slide strip below, and the slide panel with shader sliders, palette and notes
Ornament is recursion with good manners: a slide from Cathedrals of the void over Apollonian circle lace
Ornament is recursion with good manners: a slide from Cathedrals of the void over Apollonian circle lace
The impact.glsl slide shader open in the editor, with the project's shader and transition files listed on the right
The impact.glsl slide shader open in the editor, with the project's shader and transition files listed on the right
1798, a slide set as three misregistered plates with a halftone
1798, a slide set as three misregistered plates with a halftone
The reference tab: the deck.js API, slide keys and layouts next to the running deck
The reference tab: the deck.js API, slide keys and layouts next to the running deck
Mid-transition: the burn transition carrying the iris slide into the next one, the sixth of eleven generated transition slides
Mid-transition: the burn transition carrying the iris slide into the next one, the sixth of eleven generated transition slides
The preset menu with its eleven decks grouped under Start here, Cosmotechnics and Violence and ritual
The preset menu with its eleven decks grouped under Start here, Cosmotechnics and Violence and ritual
The rings of Saturn: a ringed planet drawn in a starfield, the title set in a serif
The rings of Saturn: a ringed planet drawn in a starfield, the title set in a serif
The Swiss riot preset in the studio, with a slide of echoed AGAIN type on red
The Swiss riot preset in the studio, with a slide of echoed AGAIN type on red
The cage is a rendering: a Black Iron Prison slide in gold and black
The cage is a rendering: a Black Iron Prison slide in gold and black
A Shader school lesson on the transition contract: exactly A at zero, exactly B at one
A Shader school lesson on the transition contract: exactly A at zero, exactly B at one
The eye follows: a sigil whose eye tracks the pointer
The eye follows: a sigil whose eye tracks the pointer
Form follows force: a Swiss riot slide on a twelve-column grid with knock-out blocks
Form follows force: a Swiss riot slide on a twelve-column grid with knock-out blocks