--- 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/ ---