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Mobcrafter

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Game Version
Minecraft 1.20.1
Progress
100% complete
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onmi1855
Lvl 12Journeyman Miner
10
Mobcrafter Minecraft ModMobCrafter – Turn your block creations into controllable units

MobCrafter is a Minecraft Forge mod that lets you
turn block-built structures into controllable units.
Mobcrafter Minecraft Mod

Build structures using normal blocks, capture them, and command them
like an RTS-style army inside Minecraft.

No modeling tools. No external editors.
Just build → capture → summon → command.

What makes MobCrafter unique?

Most mods add new mobs.
MobCrafter lets you create your own units using blocks.

You can:

Build any structure using vanilla blocks

Capture it as unit data

Summon it as a living entity

Control it with commands and tools

Organize multiple units into squads

Every unit is created by the player.

Unit Sharing Portal

MobCrafter includes no pre-made units by default.
Instead, units are shared through the official portal:

https://mobcrafter.net/
and
Mobcrafter Unit Portal | 3D models for mobcrafter MOD | Patreon

You can:

Download units made by other players

Reuse or modify units

Share your own creations

Discover new designs and ideas

Unit files are stored as JSON and loaded from:

config/mob_crafter/units/


Units can be added without restarting the game.
In multiplayer, server-side units are synced to all players.

How to Use

MobCrafter follows a simple workflow:

Build → Set → Capture → Summon

1. Build a Structure
Mobcrafter Minecraft Mod

Build anything you like using normal Minecraft blocks.
The shape, size, and design are entirely up to you.

2. Place a Bone Block

Attach a Bone Block to your structure.
This block acts as the core of the unit and is required for capture.


3. Capture the Structure

Use the Capture Tool on the Bone Block.
The entire connected structure is saved as unit data.

The original structure is not destroyed.


4. Summon the Unit

Once captured, the structure can be summoned as a unit entity.
You can treat it like a controllable living object in the world.



Unit Control Tools

MobCrafter provides tools for commanding units.

Commander Wand

Controls multiple nearby units


Open command menu with right-click

Commands include Follow, Guard, Patrol, Hold, Retreat


Left-click can be used to give attack direction




Marshal Wand


Used for organizing units into squads


Assign squad names and commander names

Units in the same squad act together


Commander Wand = issuing orders
Marshal Wand = organizing your army

Editing & Customization (Optional)

MobCrafter works without editing,
but also allows deeper customization.

In-Game GUI Editing

Rename units

Adjust basic behavior

Modify simple combat values

Advanced JSON Editing

Each unit is stored as a JSON file.
You can:

Change stats

Modify behavior

Balance units

Share custom units

JSON editing is completely optional.

Tips

Simple shapes work best for beginners

Large structures are supported

Captured structures are never destroyed

Experiment freely and creatively

Supported Version

Minecraft Forge 1.20.1

Links

CurseForge:
www.curseforge.com/minecraft/mc-mods/mobcrafter

Modrinth:
modrinth.com/mod/mobcrafter

Unit Portal:
mobcrafter.net/

9 Update Logs

Update #9 : by onmi1855 05/14/2026 9:53:51 amMay 14 @ 1:53 pm UTC

Follow AI Improvements


[Fix] Stable 1-block step climbing
  • Increased jump vertical velocity from vanilla's 0.42f to 0.50f, enabling reliable 1-block step climbing
  • Added CeilingAwareJumpControl: suppresses jumps when there is less than 1.70 blocks of headroom, preventing the mob from getting stuck in the ceiling
  • Added CeilingAwareMoveControl: cancels jump requests when colliding with a wall under a low ceiling
  • Relaxed the stuck-warp threshold from 2 sec / 3 blocks → 4 sec / 5 blocks, giving the jump control enough time to complete step climbing before triggering a teleport

[Fix] Warp destination defaulting to the surface in caves

When a follow unit got stuck, the warp target was calculated using the surface heightmap, causing units to teleport above ground while following in caves. The method now uses an entity AABB collision check to find a valid nearby position, so warps resolve correctly underground.

Multiplayer Stability


[Critical Fix] Server OOM Kill during unit data sync

The server process was being killed by the Linux OOM killer during animation editor open/save operations on large units. The root cause was toJsonStringV2() (producing up to 28 MB of GC objects per call) running on the server thread. All affected paths have been moved to an IO thread:
  • Opening the animation editor (UnitDataRequestPacket)
  • Broadcasting updated unit data on save (shared base of all 7 EditPackets)
  • Player start-tracking event (onPlayerStartTracking)
  • Entity render data requests (EntityUnitDataRequestPacket)

[Fix] Removed unnecessary unit list broadcast after limb edits

[Fix] Added block count limit for limb definitions

The server now rejects limb definitions exceeding 500,000 blocks per unit.

Cost Calculation Fixes


[Fix] Cost reverting to 1 after partial edits

Editing a sub-field (e.g. shoot sound, impact effects) could reset a unit's previously confirmed summon cost back to its default value. This has been corrected.

[Fix] Server-side cost recalculation always applied on save

Summon cost is now always recomputed on the server when a unit is saved, ignoring any stale value sent by the client.
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  Have something to say?

TIM4NALIM
03/12/2026 11:32 am
He/Him • Level 29 : Expert Server owner Builder
is there mario here?
2
onmi1855
03/12/2026 11:50 am
Level 12 : Journeyman Miner
Thanks to comment!
I will make Mario Series tommorow.
Please wait a moment!
1
TIM4NALIM
03/12/2026 1:10 pm
He/Him • Level 29 : Expert Server owner Builder
send me the link
2
onmi1855
03/13/2026 11:17 am
Level 12 : Journeyman Miner
history
1
Octomemes
03/08/2026 12:05 pm
He/Him • Level 30 : Artisan Muffin Taco
yooo! Maplestory enemies!
2
onmi1855
03/09/2026 11:46 am
Level 12 : Journeyman Miner
Im so glad you like my MapleStory character! I plan to distribute it on one of the platforms. If there demand, I will make more!

MobCrafter Portal

Mobcrafter Unit Portal | 3D models for mobcrafter MOD | Patreon
2
Octomemes
03/09/2026 11:54 am
He/Him • Level 30 : Artisan Muffin Taco
aww thanks!
1
onmi1855
01/22/2026 8:05 am
Level 12 : Journeyman Miner
Java only , sorry
I wish create Bedrock version
1
Antboy1785
01/22/2026 5:03 am
He/Him • Level 1 : New Explorer
Bedrock Or no?
2

Welcome