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[Home](./index.md) &gt; [three-loader-3dtiles](./three-loader-3dtiles.md) &gt; [LoaderOptions](./three-loader-3dtiles.loaderoptions.md) &gt; [shaderCallback](./three-loader-3dtiles.loaderoptions.shadercallback.md)

## LoaderOptions.shaderCallback property

When viewing b3dm (mesh) tiles, a callback to update shader uniforms - Default: `undefined`

<b>Signature:</b>

```typescript
shaderCallback?: (shader: Shader, renderer: WebGLRenderer) => void;
```
