No Mob Spawning on Trees Mod — Guide
Rule Syntax & Tags
Rules are constructed using specific Tags and Operators. Each line in the blacklistRules section represents a single logic check.
Available Tags
| Tag | Format | Description |
|---|---|---|
woodlogs |
woodlogs |
A shortcut tag targeting all blocks categorized as wood logs. |
position |
position:x,y,z |
Targets specific coordinates. Supports ranges (e.g., 0-64). |
block |
block:modID:name:meta |
Targets a specific block type and optional damage/metadata value. |
material |
material:name |
Targets block materials (e.g., WOOD, ROCK, IRON, LEAVES). |
mob |
mob:name |
Targets specific mobs (e.g., mob:creeper, mob:zombie). |
mobtype |
mobtype:type |
Targets categories: monster, animal, ambient, or water. |
dim |
dim:ID |
Targets specific dimensions by ID or Name (e.g., dim:-1 or dim:theEnd). |
chance |
chance:0.0-1.0 |
Adds a random probability for the rule to trigger (0.95 = 95% chance). |
biome |
biome:ID |
Targets specific biomes by ID or Name (e.g., biome:plains). |
biometype |
biometype:TYPE |
Targets Forge biome dictionary types (e.g., SANDY, COLD, DRY). |
moonphase |
moonphase:name |
Targets specific moon phases (e.g., fullmoon, newmoon). |
daytime |
daytime:0-23999 |
Targets specific times of the Minecraft day. |
light |
light:range,type |
Targets light levels. Types: mixed, sky, or block. |
Logical Operators
Tags can be combined to create complex conditions:
* AND: & or && (Both conditions must be true)
* OR: | or || (Either condition can be true)
* NOT: ~ or ! (The condition must be false)
* Parentheses: ( and ) (Used to group logic)
Advanced Rule Prefixes
NMSOT allows for more than just blacklisting. By using special prefixes at the start of a rule, you can change its behavior.
Whitelisting (- Prefix)
If a rule starts with a minus sign -, it acts as a whitelist. Whitelist rules override previous blacklist rules. This is useful for allowing spawns on specific blocks that would otherwise be blocked by a general material rule.
* Example: woodlogs followed by -block:minecraft:log:0 will block spawns on all logs except Oak logs.
Adding/Overriding Spawns (@ Prefix)
If a rule starts with @, it is treated as a new spawning entry, allowing you to force mobs to spawn where they normally wouldn't.
* Format: @tag1, tag2, weight:X, count:min-max
* Example: @biometype:SANDY, mob:Ghast, weight:300 makes Ghasts spawn in deserts.
Practical Examples
Use these examples as templates for your own nmsot.cfg file:
-
Safety in Wooden Houses: Prevents monsters from spawning on any wooden material (planks, stairs, etc.).
material:wood & mobtype:monster -
Rare Endermen: Greatly reduces the spawn rate of Endermen in the End dimension.
dim:TheEnd & mob:enderman & chance:0.95 -
Selective Tree Spawning: Stops all mobs from spawning on logs except for Spiders.
woodlogs & !mob:spider -
Time-Based Danger: Prevents all monster spawns during the day (ticks 0-12000).
daytime:0-12000 & mobtype:monster -
Moon-Dependent Spawns: Only allows certain mobs to spawn during a full moon.
!moonphase:fullmoon & mob:zombie(This blacklists zombies when it is NOT a full moon)