Little Logistics 1.21.1.1-beta.2

Pre-release (beta) — first build on Minecraft 1.21.1 / NeoForge. Please test in a non-critical world before relying on it.

This is the first release of Little Logistics for Minecraft 1.21.1 / NeoForge, ported over from the previous 1.20.1 (Forge) build. Alongside the platform update, this release brings a major overhaul of the docking and routing systems, new tutorial content, and a batch of important data-safety fixes. As a beta, please try it in a non-critical world first.

Supersedes 1.21.1.1-beta.1, which failed to publish its Maven artifact due to a dead publish target; no code changes from beta.1 other than that publishing fix.

Minecraft 1.21.1 / NeoForge Update

• Ported the entire mod from Minecraft 1.20.1 (Forge) to Minecraft 1.21.1 (NeoForge).

New Content & Features

• Redesigned docking system: old dock, hopper, and charger variants are unified into a single adaptable multipart dock block plus a matching dock rail. Includes a new in-world configuration GUI (idle-timeout control with presets, selectable redstone modes) and enhanced crane model visuals.
• Routing overhaul: tug and train routing reworked with improved pathfinding, a better UI for selecting destination blocks, and refined route compilation.
• Diagonal tug travel: tugs can now move diagonally, enabling more efficient water routes.
• Route path preview: hold a wrench to visualize the compiled path of a tug or train route item.
• Automatic rail reservations: junction rails now use a reservation system to prevent locomotives from deadlocking and to improve traffic flow.
• Auto-ownership & chunk loading: tugs and locomotives are now automatically owned and chunk-loaded when placed, with new config options for route lookahead and chunk retention.
• Create Ponder tutorials: added Ponder scenes covering tug linking, routing, and docking, and locomotive docking (replacing the old in-game Patchouli guide).
• Dedicated creative tabs: mod items and blocks are now organized into their own creative-mode tabs.
• Added a visual socket detail to the docking-station model, and improved the seater car texture.

Bug Fixes

• Fixed item duplication/loss on chunk unload for the Chest Barge and Chest/Barrel Car — inventory was previously both dropped and kept when the chunk unloaded.
• Fixed fuel/capacitor item duplication on chunk unload for Steam and Energy Locomotives.
• Fixed silent route data loss — waypoints could be dropped when editing tug and locomotive route items.
• Fixed server crash when a locomotive route exceeded the waypoint limit; the route tracker could crash the server tick on very large routes.
• Fixed a client-side native memory leak in route/vehicle rendering that grew every frame while holding a route item or wrench.
• Fixed Chunk Loader Barge data loss — it previously lost its color, spring-link, and entity data on reload; save/load now chains correctly.
• Fixed lost leader spring-link on re-save caused by an NBT key mismatch.
• Fixed locomotive junction deadlocks at rail junctions.
• Fixed route copy recipes and enabled shift-click mass production.
• Fixed custom switch, tee, and junction rails so they properly auto-connect and reshape with vanilla rails.
• Fixed a crash when a solo wagon or barge stalls on its own without a head vehicle.
• Fixed Fluid Tank Car failing to render its fluid contents.
• Fixed synced-data ID collisions on the Fluid Tank Barge and Fluid Tank Car.
• Fixed docking-station crane icon and texture rendering glitches.
• Fixed a tug routing penalty calculation error that affected path selection.
• Fixed dock follower-vehicle binding and settlement accuracy during docking.
• Fixed inconsistent vehicle coupling/linking data.

Balance & Tweaks

• Improved train collision detection and pathfinding accuracy.
• Improved locomotive game-state persistence to prevent desync issues.
• Improved docking physics and tug behavior when approaching docks and starting new routes.
• Guide rails removed — use dock rails and wrench-based route visualization instead.

New Contributors

• @chipsams made their first contribution in https://github.com/muradakh/LittleLogistics/pull/251
• @thisaray made their first contribution in https://github.com/muradakh/LittleLogistics/pull/265

Full Changelog: https://github.com/muradakh/LittleLogistics/compare/mc1.20.1-v1.20.1.1...mc1.21.1-v1.21.1.1-beta.2