Lena was a solo dev building Wilderwind , an open-world survival game. For months, she’d used MapGen v2.1 — solid, reliable, but quirky. Her testers loved the forests but kept complaining about two things:
: The tool will generate several critical files for your mod: provinces.bmp : The actual province map used by the game. heightmap.bmp : Controls the 3D elevation of the terrain. terrain.bmp : The visual texture of the land. definition.csv : The text file linking province IDs to their colors. mapgen v2.2
MapGen v2.2: Enabling shitty map designs since 2018 : r/hoi4 Lena was a solo dev building Wilderwind ,
is a community-developed tool used to create custom world maps for Hearts of Iron IV (HOI4) . It simplifies the modding process by allowing users to generate essential map files—such as province layouts, terrain, and heightmaps—from simple image inputs rather than drawing thousands of pixels manually. Core Requirements for Development heightmap
: Assignment of terrain (plains, mountains, forests) based on specific RGB values.