Spawn Detector implements one of the separate features of NEI, for example, when you press the L button, a 3D grid appears on the blocks indicating where mobs can spawn. The yellow grid means that monsters only appear in this place at night, and the red grid means that mobs will be generated at any time.
How to install Spawn Detector
- Download and install LiteLoader
- Download mod
- Unzip it and copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods