Here's an idea for bottom-up sandbox worldbuilding.
Using Arr-Kelaan Hexmapper, create a map which is nothing but sea hexes.
Add a single hex of another type to begin an island (e.g. a town, plains, hills, forest etc.), number it, and detail it in some way - anything from a simple description, an encounter, a lair, or even an entire city or dungeon. You then have permission to add another hex. Number that, and detail that in some way before adding another.
Repeat until you have an island...then a continent...then a world. Or you may find that an island or two is all you need to run a campaign. It's also a world which is very oriented towards D&D gameplay, because wherever the PCs go there will be something interesting to interact with, and that's the essence of a sandbox.
Although bottom-up worldbuilding is not new, I've a feeling that this disciplined approach to it might be. Additionally, you have an incentive to keep detailing hexes (unless you cheat and break the rules by painting them in en masse), because you get to watch your world grow.
Using Arr-Kelaan Hexmapper, create a map which is nothing but sea hexes.
Add a single hex of another type to begin an island (e.g. a town, plains, hills, forest etc.), number it, and detail it in some way - anything from a simple description, an encounter, a lair, or even an entire city or dungeon. You then have permission to add another hex. Number that, and detail that in some way before adding another.
Repeat until you have an island...then a continent...then a world. Or you may find that an island or two is all you need to run a campaign. It's also a world which is very oriented towards D&D gameplay, because wherever the PCs go there will be something interesting to interact with, and that's the essence of a sandbox.
Although bottom-up worldbuilding is not new, I've a feeling that this disciplined approach to it might be. Additionally, you have an incentive to keep detailing hexes (unless you cheat and break the rules by painting them in en masse), because you get to watch your world grow.