Unity3D also has WebGL support, and is surprisingly quick for having a full physics and high quality rendering engine where you can build in C#. That would allow you to make a MineCraft clone that runs natively in the browser, and because it&#x27;s Unity (a fully grown game dev environment) you will not have to reinvent any wheels or worry about many edge cases.<p>The <i>really</i> hard part about MineCraft isn&#x27;t rendering, though; it&#x27;s multiplayer.