#### jitter (float in range [0.0, 1.0])
Determines the amount of random variance the placement’s position may have within its 8✕8 chunk pixel. 0.0 means that the placement will always be placed exactly in the middle of the pixel, while 1.0 means the placement can appear anywhere within the pixel.
#### add_to_poi_graph (bool)
Determines whether the placement factors into the POI mesh, a system that we can use to place world features along imaginary lines between nearby world placements.
#### allow_rivers_nearby (bool)
Determines whether the placement should have rivers nearby.