After selecting the region of the world map we want to explore and making a rough sketch of it, we come to starting to add the details to it.
The first thing to do is sharpen up the edges of the islands, to make it look more like coastlines. There are no rules for this, so just make it look however you want. In addition I throw in a bunch of smaller islands scattered across the map, forming lesser chains between the larger ones. One larger island is added as well, right in the middle of the map. I have plans for that.
Looking at the map, I also decide that I want to break up the larger island in the southwest a little as well. It is a large landmass and so I break off two smaller islands from it while still retaining the original shape overall. This is, after all, a world of islands and archipelagos and a land mass of that size stands out.
With shape given to the landmasses, and islands added, we begin to add in landforms – mountains, hills and the like. We already know where the mountains go so we add those in on the map, following the outline we previously sketched. How exactly to shape them is left up to the world builder.
If we were starting fresh with no world map to draw from, we would roll for the mountains. Each region would have 1d4+1 mountain systems, rolling 1d4 for which quadrant of the map they were in. The systems themselves are 4d8 hexes long, rolling a 1d12 for the direction they run in. Each system can be flanked by 1d4-1 lesser systems, shorter in length than the main system. But we don’t need to do that.
With the mountain chains put in, I also add the volcanoes that we had marked down early as well. I add one extra one, in the new island in the middle of the map.
Next step is to add foothills. On either side of the mountains we have added, foothills 1d3-1 hexes wide exist. On some sides the mountains can rise sheer up, while others others can extent out into rugged hills. There isn’t a lot of room on the islands for these, but we add them in as best we can.
In addition to foothills maps can contain rolling hills, much less rugged and more inhabitable. Each region would have around 3d4 of these, though given we are a mostly water map there isn’t much room for that. On a mostly land map we could add that many in. Instead we find a couple of islands where we can ad in a couple of patches of hills.
Maps can also have special features, like depressions, gorges and escarpments, usually about 1d6 in number. Again, given our lack of land, that isn’t something we can really add in on our map.
As can be seen, a lot of fun can be had rolling up landforms and experimenting with where to place them and what they look like. At some point I will do it as an example given they can’t really fit on a mostly water map.
The end result of placing all of the landforms and detailing the islands produces a map that looks like this;

The map is made with Wonderdraft.
Next time we will be working on the climate, weather and terrain of the region.