The advantage of this kind of tile-set, is the tiles don't have to be some fixed basic size. If you have a 2D Cartesian grid to fill, you could add arbitrary si

The advantage of this kind of tile-set, is the tiles don't have to be some fixed basic size. If you have a 2D Cartesian grid to fill, you could add arbitrary sized tiles (1x2, 2x4, etc) and they don't all have to be rectangles... So you could have variable sized features in your tile-set. You could also allow the user to "paint" the grid with probability modifiers to adjust what populates. You could combine... uhh... layer generative methods together. Start with a 2D grid. Adjust land elevation probabilities with underlying shapes (pick your generative method). Let this algorithm generate based on the "continental plates" from the previous step. Then apply a wind/water erosion algorithm. Permute possible underlying algorithms in each layer...