Yueyue Chunk Editor

A visual offline editor for saved Minecraft worlds, by Yisibite. Current release: 1.0.36 for Minecraft 26.3. Open Saved Chunk Editor from the title screen. Back up important worlds before editing.

Maps and selection

• Display blocks actually saved in the world, with a height-limited overhead view or a horizontal slice. The default overhead limit starts at the world's maximum height. Adjust Y with the slider, or switch to the numeric input and enter a valid height; hover for block coordinates and names. Height and slice settings only change the preview: copy, move and delete still act on entire chunks.
• Terrain colors use representative top-face texture colors from current resources, biome tint and terrain-height shading. Biome and residency-time layers and a slime-chunk overlay are also available. This is a saved-data viewer, not an unexplored-terrain generator or a full photorealistic renderer.
• Load worlds explicitly into top tabs, then switch between cached maps and dimensions. Loading shows real work progress and an estimated remaining/completion time; manual refresh rereads changed data.
• Left-click selects or deselects a chunk; Shift-click/drag adds a selection, Ctrl-click removes it, middle-drag pans and the wheel zooms. Right-click opens editing actions. Edge panning can continue outside the map/window; dwelling over a button/input for 100 ms pauses it until the pointer returns inside the map.

Editing

Copy, cut, move or delete selected chunks, or paste into a different world/dimension. Paste/replace begins with a ghost preview; click a destination to request confirmation. Occupied destinations require explicit replacement confirmation. Cutting does not remove the source until the paste succeeds.

Terrain, block entities, entities, POI and supported scheduled ticks/recorded times travel together; copied entities receive new UUIDs. World-global data and player inventories/positions are not chunk contents. Arbitrary third-party coordinate tags cannot all be relocated automatically; use compatible mod sets across worlds.

Low-residency cleanup can use vanilla InhabitedTime or this mod's recorded loaded time. InhabitedTime is accumulated player residency ticks, not every possible kind of chunk loading; unrecorded mod-time history is unknown rather than zero. The interface reports compressed data, allocated sectors and operation/protection-copy sizes.

Edits require the affected worlds to be closed. Writes use locks, affected-file protection copies, validation and rollback/recovery records. Undo refuses to overwrite subsequently changed data. These mechanisms do not replace independent backups.

Custom slime chunks

In the Overworld selection context menu, choose Make selected chunks slime chunks or Make selected chunks non-slime chunks. Rules are saved per world without changing its seed or terrain. They override only the underground slime-chunk seed test; normal height, difficulty, space and spawning conditions still apply. Swamp-surface spawning is unchanged.

For local singleplayer, the same overrides can appear in MiniHUD 0.41.2 and Xaero's Minimap 26.6.0, including its cache path with Xaero's World Map 1.47.0. Enable those mods' slime overlays yourself. These mods are optional; the editor works without them. Xaero's World Map itself has no separate slime overlay. Remote multiplayer clients do not currently receive these custom rules for their overlays; actual server spawning requires this mod on the server. Other seed tools do not automatically recognize the overrides. Removing the mod restores vanilla seed-based spawning.

中文介绍与使用

重要存档请先备份。 在游戏主菜单打开存档区块编辑器，主动加载存档后，它才会出现在顶部标签。可切换存档和维度，剪贴板在本次编辑会话内保留。

• 真实存档地图：显示已保存方块，支持地形、群系、驻留时间及史莱姆区块叠层。默认限高俯视，显示不高于指定 Y 的最高非空气方块；也可切成只看该 Y 的水平截面。高度可用滑块，或切换到数值输入框后输入合法 Y；悬停显示方块坐标和名称。限高与切片只影响预览，复制、移动、删除仍操作整个区块。地形取色参考当前资源包顶面材质、群系染色和高差，不生成未探索区域。
• 选区操作：左键选中 / 取消单块，Shift 单击或拖动追加选区，Ctrl 移除，中键拖图，滚轮缩放。右键有选区时提供复制、剪切、删除等；没有选区时提供粘贴、替换。先看虚影，左键确定落点后才询问确认；目标已有区块时额外确认替换。复制和剪切后保留原选区。
• 跨存档与维度：支持复制 / 移动地形、方块实体、实体、POI、支持的计划刻及计时记录。剪切成功粘贴后才删除源区块。不会复制玩家背包、玩家位置或所有世界全局信息；第三方自定义坐标标签不保证自动换算。
• 读取和清理：读取进度条显示阶段、区块数量、百分比和动态预计结束时间；已加载地图有缓存，支持刷新。低时长筛选可选原版玩家驻留累计刻数或模组安装后记录的实际加载时间，未记录历史不当作零。
• 修改史莱姆区块：主世界选区右键可改为史莱姆 / 非史莱姆区块，不改世界种子。仍遵守地下史莱姆的 Y、空间和刷怪规则，不改变沼泽表层刷怪。单人档可适配 MiniHUD 和 Xaero 小地图显示；多人客户端尚不支持这份自定义叠层规则同步。
• 保护与撤销：运行中的存档拒绝编辑；写入前保留受影响文件副本，支持校验、回滚及撤销。撤销发现后续文件已变化时拒绝覆盖。清理撤销副本需要单独确认。

Requirements

Minecraft 26.3, Java 25, Fabric Loader 0.19.5+, Fabric API 0.161.0+. Local editing occurs from the title screen while affected worlds are closed. The optional server component applies custom slime-chunk rules; it is not remote file-editing access. No personal world or settings are bundled. Complete corresponding source is attached separately.

References and credits

The biome-map presentation is visually inspired by Cubiomes Viewer, by Cubitect and contributors. Cubiomes is credited as its related biome-generation library. This editor reads saved chunk NBT using its own reader; these links describe the visual reference, not a bundled Cubiomes generator. Terrain-color presentation also references Xaero's Minimap by xaero96; texture sampling and map rendering are independently implemented. Slime selection uses the Minecraft Java Edition seed/chunk rule, with this mod's per-world overrides. MiniHUD provides an optional predicate integration; Xaero's World Map is referenced for its optional cache integration. Minecraft/Fabric APIs supply game data and lifecycle/UI hooks. These are separate visual, algorithm/rule and API references: no Cubiomes engine or third-party mod binary, implementation, texture or logo is bundled. 中文来源说明：群系地图视觉参考 Cubiomes Viewer / Cubiomes 相关项目，地形取色显示参考 Xaero 小地图；实际读取、取色和绘图由本模组实现，不内嵌或调用 Cubiomes 地形预测引擎。史莱姆判断沿用 Minecraft Java 版规则并叠加本模组存档覆盖规则；MiniHUD / Xaero 仅为可选接口适配。相关作者和 API 权属各自保留。

See REFERENCES.md and THIRD_PARTY_NOTICES.md in the source archive for precise attribution. Yueyue code is developed by Yisibite with AI assistance.

中文

月月存档区块编辑器mod：主界面入口，可视化查看真实已保存地形、限高俯视及截面，跨存档/维度复制和移动区块，虚影粘贴与替换确认、批量删除、驻留时间筛选、空间统计和读取进度。重要存档请先备份，操作前关闭存档。群系地图显示风格参考 Cubiomes Viewer，读取的是已有存档数据，不预测未探索地形。