I have finished Part 2 of the tutorial revision I’ve been working on. Part 1 showed you how to create the basic landmass shape, and some techniques for generating a random map if you don’t have a sketch to start with. Part 2, posted here, shows you how to color in your ocean/sea, and how to color your landmass with textured grass and dirt.
Here is a shot of the example map from the tutorial; this is what you end up with at the end of Part 2.
If you use this tutorial, please let me know whether you found it useful, or about any problems or errors you found. Thanks!