title: Generating tile noise maps "on the fly"
body: <p>I’m interested in generating 3D height maps for a 2D game I am working on. I am using this to create land masses like in Minecraft or Dwarf Fortress.</p>
  <p>I've created 2D heightmaps before, but I used a very rudimentary algorithm that just interpolated between points of a fully random noise array to create a fixed size map. This doesn't tile however since if I try to add a new map next to it, it doesn't account for the height of the existing map.</p>
  <p>I have read about Perlin and Simplex noise, but I’m now confused on how to apply Perlin or Simplex noise to a 2D array of height values.</p>
  <p>Any help with this would be greatly appreciated. I have no idea what to do anymore. The term 'octaves' not on sheet music scares me.</p>