The fifolog in question is ss-map, downloadable here. I will be discussing only the green part of the map, but all of the main parts of the map render the same way (with the main configuration happening in object 1). The objects in question are: 1: Brown (pathways); 2: dark brown (rocks?); 3: yellow (sand); 4: green (grass); 6: dark green (unknown, not much uses this); 6: grey (stone); 7: red (roof); 8: brown (roof). Object 9, water, has its own configuration which I haven't investigated, but the water seems to all be at the same elevation anyways.
The border shadows around the map are also dynamically generated; they use EFB copies. The relevant objects are currently numbered 16 and 17 as of Dolphin 5.0-14344, and their vertex data is at offsets 00047466 and 000476d5 respectively.