# DoomMelt — 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 melts down the screen in uneven dripping columns, like the classic Doom screen wipe

- **Install:** `npm install gl-transitions`
- **Registry:** gl-transitions · **Framework:** glsl · **License:** MIT
- **Docs and preview:** https://gl-transitions.com/editor/DoomMelt
- **Source:** https://github.com/gl-transitions/gl-transitions/blob/master/transitions/DoomMelt.glsl
- **Example:** https://skills.varg.ai/previews/lib-gl-transitions-doom-melt.mp4?v=40245 (Rendered by varg from the library’s own code (GL Transitions · rendered by varg))
- **Time:** Seek-safe. Time is an input, so frame N always renders the same. Drop it into a render as it is.
- **Runs:** local render, free
- **Aspect:** any

## Prompt that renders it frame-exact

Add the "DoomMelt" transition from GL Transitions (by Zeh Fernando, MIT; https://gl-transitions.com/editor/DoomMelt, GLSL source https://github.com/gl-transitions/gl-transitions/blob/master/transitions/DoomMelt.glsl) between levels of a gaming edit or into a retro end card: 1.4 s, linear progress. The columns fall early in the transition, so give it room. Remotion: `npm install gl-transitions @gl-transitions/remotion @remotion/transitions`, then a `<TransitionSeries.Transition>` with `presentation={glTransition({ name: "DoomMelt", params: { bars: 30, amplitude: 2, noise: 0.1, frequency: 0.5, dripScale: 0.5 } })}` and `timing={linearTiming({ durationInFrames: 42 })}` (42 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) / 1.4, 0, 1); never from requestAnimationFrame or a timer, so every frame renders the same. ffmpeg's xfade can't run GLSL. `bars` (30) is the number of columns, `amplitude` (2) how fast they fall (lower it for a slower melt), `noise` (0.1) and `frequency` (0.5) how uneven they are, `dripScale` (0.5) the drips.

## Used in

- [Beat-synced slideshow](https://skills.varg.ai/video/beat-slideshow.md)
- [Music video](https://skills.varg.ai/video/music-video.md)
- [Kinetic manifesto](https://skills.varg.ai/video/manifesto.md)
- [News broadcast package](https://skills.varg.ai/video/news-package.md)
- [Photo memories](https://skills.varg.ai/video/memories.md)
- [Game trailer](https://skills.varg.ai/video/game-trailer.md)

## More transitions

- [Chromatic Aberration Wipe](https://skills.varg.ai/component/hf.chromatic-aberration-wipe.md) — `npx hyperframes add chromatic-aberration-wipe`
- [Colorama Wipe](https://skills.varg.ai/component/hf.colorama-wipe.md) — `npx hyperframes add colorama-wipe`
- [Cross Warp Morph](https://skills.varg.ai/component/hf.cross-warp-morph.md) — `npx hyperframes add cross-warp-morph`
- [Cut the Curve](https://skills.varg.ai/component/hf.cut-the-curve.md) — `npx hyperframes add cut-the-curve`
- [Directional Wipe](https://skills.varg.ai/component/hf.directional-wipe.md) — `npx hyperframes add directional-wipe`
- [Domain Warp Dissolve](https://skills.varg.ai/component/hf.domain-warp-dissolve.md) — `npx hyperframes add domain-warp-dissolve`