Interface IBiomeCreatureZones

A multiplier for the zone distance tier modifier.

IE, by default, moving one zone adjacent from 0 increases the tier by 1. With a multiplier of 2/3, it only increases the tier every 2/3 zones.

The size of a zone, on the X and Y axes.

The starting/min tier of this biome, as compared to other biomes. IE, say coastal goes up to tier8, and volcanic starts at tier5 (because it's inherently harder).

Defaults to 0.