ShowMonsters is a mod that lists the mobs that can be picked by the spawning algorithm to spawn in the block where the player's feet are positioned (Before v3 the head was used). It will also perform checks to validate whether the position is good for spawning, and is useful because it can be used to identify locations where special spawns such as Wither Skeletons and Witches can occur.
Install the mod and press F4 (F3 for older versions) to toggle the display which lists the monsters and their weight (chance of being picked).
Apoc's Nether Fortress Bounding Box Outline Mod is also available in the older distributions.
To use it hold F3 and press N to display the bounding boxes of the Nether Fortress structures.
This mod is provided "as is" and all issues arising from its use are at your own risk.
- ShowMonsters(3.3) (MC 1.5.1) (Works in SMP when also installed on Server; apoc has a Forge version of NFBBOutline; check his thread)
- ShowMonsters(3.3) + Apoc's NFBBOutline(v0.1) (MC 1.5.1) (Single Player Only)
Bukkit Versions (Thanks to Warloxx):
- ShowMonsters(3.3) (MC 1.5.2) (Bukkit SMP Only)
CustomCheck Example for Modders: