Is there a way to access d3.js in the API for drawing on the map layer? Something like this isometric tile example would be pretty cool. It'd be fun to put a force-directed-graph in the campaign handouts too. Great for relationship mapping! Or dynamic hex-tiles for volcano eruptions and floods. Here's a Hex Mapper example. Nice Minecraft Overviewer . There's a whole load of other examples: (mostly for visualizing data, but there's a few maps) <a href="http://bl.ocks.org/mbostock" rel="nofollow">http://bl.ocks.org/mbostock</a>