title: Texture to data URI in THREE.js
body: <p>Most of the people have opposite problem, but I want to ask is there any simple way to get texture data back to the data URI.</p>
  
  <p>I am using render to texture (RTT) to render the scene in background (with different camera). I want to be able to send this data to the server or just display in img element for test purpose.</p>