promotional bannermobile promotional banner

RegionSpawnMobs

Take full control of how mobs spawn in your world. Define where they appear, how many, when, and under what conditions.

File Details

RegionSpawnMobs-1.1.5.jar

  • R
  • May 11, 2026
  • 441.04 KB
  • 30
  • Early Access

File Name

RegionSpawnMobs-1.1.5.jar

Supported Versions

  • Early Access

Changelog - Version 1.1.5

Release Summary

This release introduces the Spawn Marker system — a new way to spawn mobs at fixed positions in the world, independent from regions. It also brings improvements to SpawnPoints with Boss Point priority, better spawn failure handling, and several fixes.


New for Server Admins

1) Spawn Markers

Markers are fixed spawn anchors placed directly in the world at a specific position. Unlike regions, markers don't cover an area — they spawn mobs exactly where they are placed.

What you can configure per marker:

  • Name and world
  • Which mobs can spawn, with weight and max alive per mob
  • Spawn mode: Continuous, Threshold, or Wave
  • Preset (controls spawn interval and quantity)
  • Activation distance: marker only activates when a player is nearby
  • Leash radius: mobs that wander too far are teleported back to the marker
  • Parent marker: a child marker can inherit mobs, preset, mode, and conditions from a parent
  • Time of day and weather conditions per marker and per mob

Practical impact:

  • precise control over where specific mobs appear
  • useful for boss encounters, event NPCs, and fixed-position spawns
  • works independently from region boundaries

2) Marker visual entity

Each marker shows a visual entity in the world so admins can see where it is.

Behavior:

  • the visual is hidden from adventure-mode players
  • shows the marker name above it
  • clicking the visual opens the marker editor directly
  • visuals are automatically recreated if they disappear

Practical impact:

  • easy to locate and edit markers without commands

3) Marker commands

Command Description
/rsmmarkercreate <name> Creates a marker at your current position
/rsmmarkerdelete <name> Deletes a marker by name
/rsmmarkerlist Lists all markers with position, world, preset, and mob count
/rsmmarkerrefresh Recreates all marker visuals in the current world

4) Marker UI screens

Marker list (MarkerConfig):

  • Lists all markers with name, world, position, active state, and activation distance
  • Search by name or world
  • Teleport to marker from the list
  • Edit button opens the full marker editor

Marker editor (MarkerEdit) — two tabs:

Marker tab:

  • Edit name, active state, parent marker, preset, spawn mode
  • Activation distance
  • Leash radius (Default or 1–32 blocks)
  • Yaw and pitch
  • Teleport to marker
  • Refresh visual
  • Delete with two-step confirmation

Mobs tab:

  • Fuzzy search for available NPC types
  • Configure weight, max alive, time of day, weather, and terrain per mob
  • Add, update, or remove mobs from the marker

SpawnPoint: Boss Point

SpawnPoints now support a Boss Point flag.

What it does:

  • Boss Points are always attempted first, before normal SpawnPoints
  • Normal SpawnPoints continue to use random order as before
  • Each Boss Point still respects its own preset interval and max spawn limit

How to enable:

  • Open the region editor → Spawn Points tab → select a SpawnPoint → check Boss Point

Practical impact:

  • guarantees that boss or priority NPCs are attempted every spawn cycle
  • avoids the situation where a boss spawn point is skipped due to random ordering
  • supports up to 3 boss points per region without any performance concern

Spawn Failure Handling

Marker spawn failures no longer disable the marker permanently

Previously, after 5 consecutive spawn failures a marker was permanently disabled and saved as inactive.

New behavior:

  • failures caused by weather or time conditions are not counted as failures — the marker simply waits
  • real failures (engine could not spawn the entity) use exponential backoff: 5s → 10s → 20s → ... up to 5 minutes
  • the marker automatically recovers when a spawn succeeds
  • a warning log is shown when backoff is applied
  • a recovery log is shown when the marker resumes spawning normally

Practical impact:

  • markers no longer need manual reactivation after temporary issues
  • weather-restricted markers behave correctly without accumulating false failures

Admin Tools (Items)

All RSM items are available in the Tools tab in Creative mode. Each item shows a HUD legend on screen explaining its controls while held.

Item Left Click Right Click
RSM Config Tool Opens the main config menu (Regions, Markers, Presets, Global, Terrain) Opens the region editor directly
RSM Marker Tool Opens the marker list Right-click a marker visual to open its editor directly
RSM Marker Menu Opens the marker list
RSM SpawnPoint Menu Opens SpawnPoint creation at your current position

Practical impact:

  • no need to type commands for day-to-day setup
  • the HUD legend visible while holding each item tells you exactly what each click does
  • the Marker Tool lets you click directly on a marker visual in the world to edit it — useful when you have many markers close together
  • the SpawnPoint Menu item is the fastest way to add SpawnPoints: stand where you want the point, left-click, done

Fixes

  • Fixed corrupted  character in the mob selector label in the marker editor
  • Fixed BOM encoding issue that caused compile errors after manual file edits

Compatibility

  • Data compatibility: fully compatible with 1.1.4
  • Migration required: no
  • New file created on first marker: mods/RegionSpawnMobs/markers.json

Version: 1.1.5