OptionaloriginCenter offset in world X/Z (meters). Default [0, 0].
OptionalrotationOrientation in degrees, rotating the geometry about the +Y axis around origin (counter-clockwise viewed from above). Default 0.
OptionalsizeHorizontal extent in world units (meters): a single number for a square, or
[width (X), length (Z)]. Default 100000 (100 km).
OptionalsurfaceWater-surface tessellation: a single number for both axes, or [X, Z].
The default 0 uses the fewest triangles needed to fill the footprint
outline (a flat surface needs no interior grid — the waves are shaded
per-pixel). A positive value lays down a regular subdivision grid, which
only matters when vertex displacement is enabled. Default 0.
Options shared by the ocean geometry builders.