Create Optimized Trains

Performance optimization addon for Create Mod trains (Forge 1.20.1).

Features

1. LOD (Level of Detail) for Trains

• FULL — Real carriages with full physics (player nearby)
• MEDIUM — Simplified physics, normal rendering
• LOW — No physics, no collisions, minimal contraption updates
• GHOST — Ghost entity, no rendering, abstract data only

2. Carriage Grouping / Abstraction

• Merges multiple carriages into a single logical entity (TrainGroup)
• Stores only: length, speed, position, carriage list as NBT
• Expands back when the player approaches

3. Safe Multi-threading

Secondary thread (safe):

• Route calculation
• Collision prediction
• Schedule optimization
• Priority management
• LOD decisions
• Predictive simulation

Main thread (required):

• Actual entity movement
• Create physics
• Rendering
• Block interaction

4. Tick Throttling (Partial Updates)

• FULL: every tick
• MEDIUM: every 3 ticks (configurable)
• LOW: every 8 ticks
• GHOST: every 20 ticks

5. Render Optimization

• Disables animations for distant trains
• Skips full rendering for GHOST LOD
• Reduces particles and visual effects
• Hides internal details when not visible

6. Proxy Entities

• Lightweight entity representing the entire train
• Replaces dozens of contraptions
• Keeps position, speed and direction
• Recreates real carriages when needed

7. Smart Chunk Loading Management

• Loads only essential chunks
• Unloads chunks behind the train earlier
• Pre-loads chunks ahead
• Anti-thrashing (prevents repeated load/unload cycles)

8. Physics Optimization

• Simplified physics for distant carriages
• Disables collisions between carriages at low LOD
• Reduces bogie checks
• Disables internal contraption physics when far away

9. Networking Optimization

• Sends updates only when speed/direction changes
• Batches packets (delta compression)
• Reduces sync frequency for distant trains

10. Priority System

• Priority by type (EXPRESS > PASSENGER > FREIGHT > LOW)
• Conflict resolution at junctions
• Track segment reservation
• Async conflict analysis

11. Dynamic Performance Monitor

• NORMAL (TPS >= 18): full fidelity
• DEGRADED (15 <= TPS < 18): light optimizations
• CRITICAL (TPS < 15): aggressive optimizations, reduced LOD distances

Configuration

File: create_optimized_trains-common.toml

All features are individually configurable with distances, intervals and toggles.

Dependencies

• Minecraft 1.20.1
• Forge 47.1.33+
• Create Mod 6.0.8+
• Flywheel 1.0.6+ (bundled with Create)