Mjolnir Forge Editor is a tool, for the popular free 3D software Blender, which modifies Halo Reach's RAM to edit forge maps. The currently loaded forge map is imported into Blender, edited, and then exported back to Reach. After a round restart, changes take effect and can be saved back to the forge map variant.
For installation instructions and guide: https://github.com/Waffle1434/Mjolnir-Forge-Editor/wiki
For installation instructions and guide: https://github.com/Waffle1434/Mjolnir-Forge-Editor/wiki