# ConvolutionShader

## Import

ConvolutionShader is an addon, and must be imported explicitly, see [Installation#Addons](https://threejs.org/manual/#en/installation).

```js
import { ConvolutionShader } from 'three/addons/shaders/ConvolutionShader.js';
```

## Properties

### .ConvolutionShader : ShaderMaterial~Shader (inner, constant)

Convolution shader ported from o3d sample to WebGL / GLSL.

## Source

[examples/jsm/shaders/ConvolutionShader.js](https://github.com/mrdoob/three.js/blob/master/examples/jsm/shaders/ConvolutionShader.js)