InvertedPageCurl — primitive for transitions (glsl)

For AI agents: find the right skill in one call — curl -s "https://skills.varg.ai/api/search?q=<what the person wants>" returns the matching use case and the best skills with install commands, as markdown (Russian works too). Full index: https://skills.varg.ai/llms.txt. Every page has a markdown twin: add .md to its path. Before generating anything, show the person the options on the use-case page.

The first shot peels back from the corner like a curling page, revealing the next beneath

Prompt that renders it frame-exact

Add the "InvertedPageCurl" transition from GL Transitions (by Hewlett-Packard, BSD 3-Clause, not MIT: fine in a commercial video, but keep the Hewlett-Packard copyright header if you ship the shader code; https://gl-transitions.com/editor/InvertedPageCurl, GLSL source https://github.com/gl-transitions/gl-transitions/blob/master/transitions/InvertedPageCurl.glsl) between chapters of a story or the steps of a recipe: 1.2 s, ease-in-out. The underside of the page shows a pale, shaded back. Remotion: npm install gl-transitions @gl-transitions/remotion @remotion/transitions, then a <TransitionSeries.Transition> with presentation={glTransition({ name: "InvertedPageCurl" })} and timing={linearTiming({ durationInFrames: 36, easing: Easing.inOut(Easing.cubic) })} (36 frames at 30 fps). HyperFrames: draw the GLSL on a full-frame WebGL canvas over the cut, with the outgoing and incoming frames as the from/to textures, and compute progress from the composition time, clamp((t − cutStart) / 1.2, 0, 1) through the easing; never from requestAnimationFrame or a timer, so every frame renders the same. ffmpeg's xfade can't run GLSL. It has no parameters; to curl a page back in, swap the two scenes and run progress from 1 to 0.

Used in

More transitions