2. Import & Export - jwoodruff40/Mjolnir-Forge-Editor GitHub Wiki

The current in-game forge map can be loaded into blender from File -> Import -> Forge Objects. This adds to whatever exists in the Blender scene, allowing multiple maps to be merged together. To clear whatever already exists in Blender, press A to select all, and X to delete all selected. To center the camera on the objects, press A to select all, and Numpad . to center the selection.

You can export the forge map back to in-game with File -> Export -> Forge Objects. After restarting the round, all changes should take effect.