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hyperframes/docs/catalog/components/grain-overlay.mdx
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James Russo 9943091247 feat(registry): seed transition blocks — 14 shader + 14 CSS showcase (#270)
## What

Add 28 transition blocks from the Hyperframe Template Structure catalog, bringing the registry to 53 total items.

### Shader transitions (14 blocks, WebGL, 4s each)
`domain-warp-dissolve`, `ridged-burn`, `whip-pan`, `sdf-iris`, `ripple-waves`, `gravitational-lens`, `cinematic-zoom`, `chromatic-radial-split`, `glitch`, `swirl-vortex`, `thermal-distortion`, `flash-through-white`, `cross-warp-morph`, `light-leak`

### CSS transition showcases (14 blocks, various durations)
`transitions-3d`, `transitions-blur`, `transitions-cover`, `transitions-destruction`, `transitions-dissolve`, `transitions-distortion`, `transitions-grid`, `transitions-light`, `transitions-mechanical`, `transitions-other`, `transitions-push`, `transitions-radial`, `transitions-scale`, `transitions-shader`

## Why

Phase D content accumulation. Transitions are the most-requested category for the catalog.

## How

- Shader transitions extracted from `shader-showcase.zip`, each a standalone HTML with WebGL shaders
- CSS transitions extracted from `showcase-bundle.zip`, each a standalone showcase page
- All tagged with `transition` + `shader` or `showcase` for catalog grouping
- Preview thumbnails generated for all 28 blocks
- Catalog pages + index regenerated

## Test plan

- [x] All 28 blocks produce preview thumbnails
- [x] `registry-item.json` validates for all blocks
- [x] Catalog pages generated (45 total items in catalog-index.json)
- [x] `oxfmt --check` passes
2026-04-14 16:32:27 -07:00

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---
title: "Grain Overlay"
description: "Animated film grain texture overlay using CSS keyframes — adds warmth and analog character to any composition"
---
# Grain Overlay
Animated film grain texture overlay using CSS keyframes — adds warmth and analog character to any composition
`texture` `grain` `overlay` `film`
<video className="w-full aspect-video rounded-xl object-cover bg-zinc-100 dark:bg-zinc-800" src="/images/catalog/components/grain-overlay.mp4" poster="/images/catalog/components/grain-overlay.png" autoPlay muted loop playsInline />
## Install
<CodeGroup>
```bash Terminal
npx hyperframes add grain-overlay
```
</CodeGroup>
## Details
| Property | Value |
| --- | --- |
| Type | Component |
## Files
| File | Target | Type |
| --- | --- | --- |
| `grain-overlay.html` | `compositions/components/grain-overlay.html` | hyperframes:snippet |
## Usage
Open `compositions/components/grain-overlay.html` and paste its contents into your composition. See the comment header in the file for detailed instructions.