--- layout: example.html title: Layer Swipe (WebGL) shortdesc: Cropping a WebGL tile layer docs: > The `prerender` and `postrender` events on a WebGL tile layer can be used to manipulate the WebGL context before and after rendering. In this case, the `gl.scissor()` method is called to clip the top layer based on the position of a slider. tags: "swipe, webgl" cloak: - key: get_your_own_D6rA4zTHduk6KOKTXzGB value: Get your own API key at https://www.maptiler.com/cloud/ ---