Chalkboard

칠판 드로잉

Renders the input as chalk on a blackboard, with outlined edges and cross-hatched shading.

Also known as: Chalkboardchalk drawingblackboard effect

Moves in browsers that support WebGPU

This device could not render the demo — showing a still

React
// Renders only in browsers with WebGPU.
// /samples/… are this site’s sample files — point them at your own image or video.
import { Shader, Chalkboard, ImageTexture } from 'shaders/react'

export default function ShaderEffect() {
  return (
    <Shader style={{ width: '100%', height: 320 }} disableTelemetry>
      <ImageTexture
        objectFit="cover"
        url="/samples/still.jpg" />
      <Chalkboard />
    </Shader>
  )
}
Vue
<!-- Renders only in browsers with WebGPU. -->
<!-- /samples/… are this site’s sample files — point them at your own image or video. -->
<script setup lang="ts">
import { Shader, Chalkboard, ImageTexture } from 'shaders/vue'
</script>

<template>
  <Shader style="width: 100%; height: 320px" :disable-telemetry="true">
    <ImageTexture
      object-fit="cover"
      url="/samples/still.jpg"/>
    <Chalkboard/>
  </Shader>
</template>
Svelte
<!-- Renders only in browsers with WebGPU. -->
<!-- /samples/… are this site’s sample files — point them at your own image or video. -->
<script>
  import { Shader, Chalkboard, ImageTexture } from 'shaders/svelte'
</script>

<Shader style="width: 100%; height: 320px" disableTelemetry>
  <ImageTexture
    objectFit="cover"
    url="/samples/still.jpg" />
  <Chalkboard />
</Shader>
Solid
// Renders only in browsers with WebGPU.
// /samples/… are this site’s sample files — point them at your own image or video.
import { Shader, Chalkboard, ImageTexture } from 'shaders/solid'

export default function ShaderEffect() {
  return (
    <Shader style={{ width: '100%', height: '320px' }} disableTelemetry>
      <ImageTexture
        objectFit="cover"
        url="/samples/still.jpg" />
      <Chalkboard />
    </Shader>
  )
}
JavaScript
// Renders only in browsers with WebGPU.
// /samples/… are this site’s sample files — point them at your own image or video.
// expects <canvas id="canvas" style="width:100%;height:320px"></canvas> on the page
import { createShader } from 'shaders/js'

const shader = await createShader(document.getElementById("canvas"), {
  components: [
    {
      type: 'ImageTexture',
      props: {
        objectFit: 'cover',
        url: '/samples/still.jpg',
      },
    },
    {
      type: 'Chalkboard',
    }
  ]
}, { disableTelemetry: true })

Props · Chalkboard

Changes apply to the demo above and to the code tabs. Descriptions come from the library registry (MIT).

NameValueDefaultRange / optionsDescription
boardColorBoard#000000—Background board color
chalkColorChalk#eceadb—Chalk stroke color
edgeSensitivityEdge Sensitivity0.50 – 1 (step 0.01)How readily edges are detected and drawn as chalk strokes
edgeThicknessEdge Thickness1.50.5 – 4 (step 0.1)Thickness of the chalk outline strokes
shadingShading0.050 – 1 (step 0.01)Amount of cross-hatch shading filling darker regions
hatchScaleHatch Scale163 – 24 (step 0.5)Spacing of the cross-hatch lines in pixels
grainGrain0.450 – 1 (step 0.01)Chalk dustiness / grain that breaks up the strokes

Every component also takes blendMode · opacity · visible · maskSource/maskType · boundingBox · id

It makes an image look as if it were redrawn in chalk on a dark board. Chalk dust breaks up the outlines, while fine hatching fills darker areas.

The default `boardColor` is `#000000`, and the default `chalkColor` is `#eceadb`. `edgeSensitivity` defaults to 0.5 and ranges from 0 to 1 to set how readily outlines appear; `edgeThickness` defaults to 1.5 and ranges from 0.5 to 4 to set line width. `shading` defaults to 0.05 and ranges from 0 to 1 to control cross-hatched shading.

Put the image or content layer underneath it first. Pair it with `Engraving` or `Paper` for a handmade surface, but low contrast between the board and chalk can hide the outlines.

When to use

Use it for educational illustrations, menu boards, and hand-drawn posters. Avoid it for product photos that need accurate color or bright, clean UI.

Open as page ↗