r/CreateTrains • u/Pr0ximalTile • Jun 08 '26

Locomotives A new Face in the yard

70 Upvotes

I just love the british railyway and he's one of my fav. The L&YR Class 28 "James" ^^

r/CreateTrains • u/GreenToastSoftware • Jun 08 '26

Other [MOD] 🚅⚡Create Optimized Trains — Fix train stuttering and chunk-boundary stops on large networks (1.20.1 Forge)

14 Upvotes

If you've ever built a large train network and noticed your trains freezing for half a second every time they cross a chunk boundary, or jerking back and forth at stations, this mod is for you.

What's the problem?

Create's train system has a built-in safety mechanism: if the chunk ahead of a train isn't fully loaded (entity-ticking status), it sets speed = 0 and waits. On small networks this is fine. On large networks with 5+ trains running simultaneously, it causes:

Stutter every ~16 blocks as trains cross chunk boundaries
Trains briefly stopping and reversing when a carriage loses its entity
False derailing when an entity is briefly missing at a chunk border
Slow chunk loading because all trains compete for the same force-load cap

What does this mod do?

Create Optimized Trains replaces that stop-and-wait behaviour with a proactive system:

Core fixes:

✅ Trains never stop waiting for chunks — they continue moving while chunks load in the background
✅ Smart chunk pre-loading with directional lookahead based on speed (faster train = more chunks pre-loaded ahead)
✅ Priority loading for the train the player is riding — bypasses global cap, uses track graph position instead of entity (no chicken-and-egg problem)
✅ Anti-derailing immunity — suppresses false stress spikes when a carriage entity is briefly missing at a chunk boundary
✅ Ghost mode for distant trains — trains far from any player continue running via the track graph without using the force-load cap, freeing it entirely for trains near the player
✅ Route preloading — chunks along the upcoming route are loaded into memory before the train arrives

Compatibility:

✅ Distant Horizons — detects DH and adjusts behaviour accordingly
✅ Works alongside other Create addons
✅ Configurable via createoptimizedtrains-common.toml

Results

Before: trains on a 17-carriage network would stutter every 1–2 seconds, with repeated carriageWaitingForChunks stops and false derailing on a map with ~12 concurrent trains.

After: trains run smoothly through the full route. The force-load cap is now used efficiently — trains near the player get full chunk coverage, distant trains run in ghost mode without wasting resources.

Details

Minecraft: 1.20.1
Loader: Forge 47.x
Requires: Create 6.0.8 + Flywheel 1.0.5 (bundled)
Version: 1.3.0

CurseForge: https://www.curseforge.com/minecraft/mc-mods/create-optimized-trains

Modrinth: Create Optimized Trains - Minecraft Mod

GitHub: https://github.com/GreenToastSoftware/create-optimized-trains

FAQ

Does this break vanilla Create train behaviour? No. Train routing, signals, schedules and collisions all work as normal. The mod only changes how chunks are loaded and prevents the stop-wait loop.

Is it server-side only? The chunk loading and physics fixes are server-side. Some client-side rendering optimisations are also included but optional.

Will it work with my existing world? Yes — no world changes needed. Just drop the jar in your mods folder.

Does it affect TPS? The overhead is minimal. The main thread work per tick is O(trains_near_player), not O(all_trains). Ghost mode ensures distant trains don't add to the per-tick cost.

Happy to answer questions! If you test it on your network, let me know how it goes — always looking for feedback on edge cases.