HOI4 Fantasy World Map Maker

Uploaded · Published May 3, 2026 · Updated June 3, 2026

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Author: 埃蒙...?

Last revision: 26 May at 11:47 UTC (2)

File size: 219.46 MB

On Steam Workshop

Description:

HOI4 Fantasy World Map Maker

v1.0.0

I’m glad to share that v1.0 is officially released! / 很高兴和大家分享，1.0 正式版发布了！

English

A standalone desktop tool for creating complete HOI4 total-conversion mods from scratch — no manual file editing required.

Features:

Draw land, sea, and lakes with circular brush / fill / transform tools
Auto-generate provinces (Poisson disk + Lloyd relaxation, supports density map)
Province merge, split, and region re-generation
Smart heightmap generation (coastal distance field + Perlin noise mountains)
Smart terrain assignment (height-based with noise blending)
Auto-generate rivers from heightmap (flow accumulation)
State creation with auto-assignment, batch building, and victory points
Country creation with flag, color, and ideology setup
Strategic Region auto-grouping by state with weather presets
Railway drawing, supply nodes, and strait adjacency editing
Continent management with province assignment
One-click full MOD export — ready to load in HOI4
Import existing MOD maps
Full Undo/Redo support
Chinese / English bilingual UI with real-time switching

How to use:
After subscribing, find the tool folder in your Steam Workshop directory and run HOI4MapMaker.exe.
Typical path: Steamsteamappsworkshopcontent3943603707251866HOI4MapMaker.exe

Import Vanilla Map: You can import the vanilla HOI4 map directly. Use "Import MOD Map" (Ctrl+Shift+M) and select your HOI4 installation directory (e.g. SteamsteamappscommonHearts of Iron IV). The tool will load all map layers, states, strategic regions, railways, supply nodes, and adjacencies. You can then modify the map and export as your own MOD.

Supported map sizes: 2048×1024 / 3072×1536 / 4096×2048 / 5632×2048

Known Issues:

River auto-generation algorithm has known bugs — manual editing recommended

Disclaimer: This is an independent community tool, not affiliated with Paradox Interactive. Users are solely responsible for MOD content generated. No game assets are included or modified. Some operations may be irreversible — please verify your actions before proceeding. The tool is not responsible for any unintended results.

Chinese / 中文

HOI4 幻想世界 MOD 制作工具 — 独立桌面应用，从零开始制作完整的 HOI4 全转换 MOD，无需手动编辑任何游戏文件。

功能特性：

圆形画笔/填充/变换工具绘制陆地、海洋、湖泊
自动生成省份（泊松盘采样 + Lloyd松弛，支持密度图控制疏密）
省份合并、切割、区域重新生成
智能高度图生成（海岸距离场 + Perlin噪声山脉）
智能地形分配（高度分层 + 噪声混合）
从高度图自动生成河流（汇流模拟）
州创建与自动分配、批量建州、胜利点设置
国家创建（国旗、颜色、意识形态配置）
战略区域按州自动分组，天气预设配置
铁路绘制、补给节点、海峡邻接编辑
大陆管理与省份指派
一键导出完整MOD，直接加载进游戏
导入已有MOD地图
完整撤销/重做支持
中英双语界面，实时切换

使用方法：
订阅后在 Steam 创意工坊目录找到工具文件夹，运行 HOI4MapMaker.exe 即可。
路径通常为：Steamsteamappsworkshopcontent3943603707251866HOI4MapMaker.exe

导入原版地图：支持直接导入原版 HOI4 地图。使用「导入 MOD 地图」(Ctrl+Shift+M)，选择 HOI4 安装目录（如 SteamsteamappscommonHearts of Iron IV）即可。工具会加载全部地图图层、州、战略区域、铁路、补给节点和邻接关系，之后可自由修改并导出为你自己的 MOD。

支持地图尺寸：2048×1024 / 3072×1536 / 4096×2048 / 5632×2048

已知问题：