Quote from: Remnant on February 03, 2014, 04:15:45 pm
Creating vast amounts of realistic terrain that holds together at all scales is one of the biggest challenges in world building. Here are a few tips I can give:
In terms of creating natural looking continent shapes, my preference is to create the continental shapes by hand using a Layout Generator and the polygon shape tool. This will often/usually be adjusted with noise functions, but the highest level shapes in the natural world have very asymmetrical results due to plate tectonics, etc, that don't look like perlin noise or similar.
For how to do this, I'd recommend going to File->open Example and navigating to \New Examples for 2.3\Scenes\Island with Mountains and Lowlands.tmd.
Here you'll see a complete scene with two different terrain types being put together. If you unfreeze the preview display and select the layout generator labelled "Island" in the top box, you will see its generating island-type shapes. Create additional overlapping shapes to define a larger continent instead of an island -- this is probably the quickest/easiest way to do it.
Note how the current polygon shape has the smooth paths turned on (right-click on the shape and enable the Bezier path), then tug on the various control handles to produce interesting cusps and inlets.