Creatures will regular spawn around the player at a rate depending on a number of factors, including biome, time of day, and number of active mobs.
Spawn Rates[ | ]
Spawn rates vary throughout different biomes. The spawn rate gives the chance per tick/frame for an attempted spawn. A rate of 600 would give a 1 in 600 chance per frame for a mob to spawn.
| Biome | Spawn Rate | Max Mobs |
|---|---|---|
| Grasslands | 500 | 5 |
| Cave(2) | 250 | 12 |
| Cave(3-4) | 200 | 14 |
| Cave(5-7) | 150 | 16 |
| Cave(8-10) | 150 | 18 |
| Swamp | 350 | 6 |
| Ruins | 250 | 8 |
| Underground Ruins | 200 | 12 |
| Mines | 200 | 8 |
| Jungle | 250 | 12 |
| Glowswamp | 200 | 10 |
| Spider Lair | 180 | 15 |
| Crypt | 150 | 20 |
| Library | 175 | 12 |
| Underworld | 150 | 20 |
Population[ | ]
A mob cannot spawn if the total creature count exceeds the biome's population. Most entities will be counted as 1, whilst others may take up more, or less, e.g. A bat would only count as 0.5 This value can also be effected by other factors, such as night.
Spawn Rules[ | ]
A mob will attempt to spawn each frame, if the spawn rate roll passes, and the population still has room to spawn. A random tile will be chosen as a spawn location, within 50 tiles away from the player, and at a distance of at least 15. The chosen tile must also be passable in order for the mob to be successfully spawned.
Despawning[ | ]
If a mob has been off screen for longer than 10 seconds, and is not a boss or animal, then the creature will be removed, and will not drop any items. Some creatures will also despawn during certain times of the day, if on the surface.