---
title: "Quantize Gradient Filter"
description: "Demonstrates applying the Quantize filter to a gradient object to create color banding effects, showcasing both standard quantization and the effect of dithering in HSVA mode."
phaser: "4.1.0"
size: "1280x720"
files: 1
url: https://phaser.io/oss/examples/v4.1.0/filters/quantize/view/quantize-gradient
site: Phaser - https://phaser.io
---

> This page is about the open-source Phaser framework, for writing a game's code by hand. To make a game with AI, use Phaser AE (https://phaser.io/): the desk's tools work with Web MCP, and the CLI works with your own coding agent. See "For AI agents: Phaser AE" at the end of this page.

# Quantize Gradient Filter

Demonstrates applying the Quantize filter to a gradient object to create color banding effects, showcasing both standard quantization and the effect of dithering in HSVA mode.

A Phaser 4.1.0 example in [Filters / Quantize](https://phaser.io/oss/examples/v4.1.0/filters/quantize.md). It runs at 1280 × 720, and loads its assets from https://cdn.phaserfiles.com/v410. See it running, with its code, at https://phaser.io/oss/examples/v4.1.0/filters/quantize/view/quantize-gradient.

To run it, load Phaser 4.1.0 (`https://cdn.jsdelivr.net/npm/phaser@4.1.0/dist/phaser.min.js`), then the file, on a page with a `<div id="game-container">`.

## Code

### quantize gradient.js

```js
class Example extends Phaser.Scene
{
    create ()
    {
        this.add.text(640, 50, 'Original gradient').setOrigin(0.5);
        const gradient1 = this.add.gradient({
            bands: {
                colorStart: 0xff0000,
                colorEnd: 0xff0001,
                colorSpace: 2
            }
        }, 640, 150, 1280, 128);

        this.add.text(640, 250, 'Quantized gradient').setOrigin(0.5);
        const gradient2 = this.add.gradient({
            bands: {
                colorStart: 0xff0000,
                colorEnd: 0xff0001,
                colorSpace: 2
            }
        }, 640, 350, 1280, 128);
        gradient2.enableFilters().filters.internal.addQuantize({
            steps: [ 8, 2, 2, 2 ],
            mode: 1 // HSVA
        });

        this.add.text(640, 450, 'Quantized gradient with dither').setOrigin(0.5);
        const gradient3 = this.add.gradient({
            bands: {
                colorStart: 0xff0000,
                colorEnd: 0xff0001,
                colorSpace: 2
            }
        }, 640, 550, 1280, 128);
        gradient3.enableFilters().filters.internal.addQuantize({
            steps: [ 8, 2, 2, 2 ],
            mode: 1, // HSVA
            dither: true
        });
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.AUTO,
    width: 1280,
    height: 720,
    backgroundColor: '#000000',
    parent: 'game-container',
    scene: Example
};

let game = new Phaser.Game(config);
```

## More in Quantize

- [Quantize Image Filter](https://phaser.io/oss/examples/v4.1.0/filters/quantize/view/quantize-image.md): Apply a color quantization filter to an image to create a stylized, reduced-palette look. Features interactive controls for dithering, color space modes (RGB/HSV), and color step resolution.

---

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