The goal of this branch is to make a bitmap that “drapes” itself over the terrain, to see if it looks reasonable. The results are best in Firefox right now. It works in Chrome and Safari but I need to put in some browser-specific handling to make it work properly across browsers. You might have to paint on the map to make it display properly. I haven’t investigated why the results are different in each browser. The color is one issue, and a race condition seems to be the other issue.