OptionalnoiseOptionalpointspoints of interest to place; defaults to width * height / 900
Optionalregionthe coarse region grid's cell side, in tiles; defaults to 12
Optionalriversriver sources attempted on high ground; defaults to width * height / 600
Optionalseaelevation below which a cell is sea; 0..1, defaults to 0.4
Optionalsettlementssettlements to place by suitability; defaults to width * height / 500
Optionalshapethe grid the realm is laid out on; defaults to 'square'
how stretched the noise is: larger values give broader landmasses; defaults to 6