NeoForge 1.21.1 1.1.5-patch4

• Version: 1.1.5-patch4
• Target: NeoForge 1.21.1
• Type: Release
• Published: 2026-07-16
• Source: Modrinth version page

Official Changelog

English

RTS Building 1.1.5-patch4

For Minecraft 1.21.1 / NeoForge and Minecraft 1.20.1 / Forge.

This patch focuses on safe recovery of RTS-placed blocks, survival unlocks, clearer interaction feedback, safer mining-drop handling, and Sophisticated Backpacks compatibility.

Player-visible changes

• Fixed tracked RTS-placed blocks being lost when “Recover RTS-placed blocks” was enabled but the player lacked the normal mining level or tool.
  • Blocks that were placed through RTS and are still tracked now bypass mining-level, tool, and Silk Touch requirements during RTS recovery: if RTS can place it, RTS can recover it.
  • Claims, cancelled break events, and other server protection rules are still respected.
• Fixed several features being incorrectly locked while Survival Balance was enabled.
  • Area mining no longer incorrectly depends on the chain-mining plugin.
  • Quick Build shapes now follow their own plugin unlocks, and rejected placement attempts provide clear feedback.
  • When the RTS camera is locked, the message now explicitly tells players to install the “RTS Camera” plugin or turn off Survival Balance in the mod config.
• Fixed the normal interaction target outline disappearing in the lower half of the screen when using a fixed RTS UI scale.
• Fixed Quick Build solid/hollow buttons appearing to change while generation still used the previous mode.
• Fixed large groups of identical drops being merged into an illegal oversized ItemStack and potentially crashing the game (#123).
• Improved Sophisticated Backpacks compatibility.
  • The same UUID-backed backpack keeps one RTS storage link whether it is placed in the world or worn by the player.
  • Right-clicking a Sophisticated Backpack from the inventory in RTS mode now only attempts placement. If placement fails, it no longer falls back to opening the backpack UI and getting stuck.
• Newly generated client configs now disable translucent placement block ghosts by default. Existing player choices are preserved; wireframe previews and placement/destruction animations are unchanged.

Technical and compatibility changes

• Tracked-block recovery now passes through server protection events, then performs a no-drop break and returns the exact recorded block item, preventing tool checks from losing items or creating duplicate drops.
• On NeoForge 1.21.1, the mining-drop buffer now merges and splits items using each item’s legal stack size and bases fallback timing on real storage progress, reducing stalls and invalid stacks during large mining jobs.
• Plugin state is resynchronized after Survival Balance configuration changes so clients do not keep stale unlock results.
• Sophisticated Backpack links now resolve real stacks from accessory, Curios, and Accessories slots before falling back to the UUID-backed virtual handler. Forge 1.20.1 also supports the older capability API.
• Regression and contract coverage was added on both maintenance lines. The NeoForge 1.21.1 suite passed in full; the Forge 1.20.1 regular suite passed, with two previously tracked performance-debt checks remaining for later optimization.

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Back to changelog index

• Newer entry: Forge 1.20.1 1.1.5-patch4
• Older entry: Forge 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6 1.1.5-patch3