Spawning tiles are tiles which have a chance to spawn enemies during a "spawn event", which occurs every 15-22 minutes. Spawning tiles do not spawn enemies if a player is within 6 tiles.
Spawning tiles can be placed over any ground to begin spawning enemies. If two spawning tiles are placed on a single tile, the spawning tile on the uppermost layer will be the only one active. Light sources do not affect spawn rate, however placing a torch on top of a spawning tile will prevent enemies from spawning.
Most blocks, walls and furniture placed on top of a spawning tile will prevent spawning except for Conveyor Belts and Spike Traps.
Types
Tiles
Other spawning objects
In addition to spawning tiles, certain ground blocks and liquids can spawn enemies in the right conditions.
External links
History