MTerrain: Optimized terrain system and editor for Godot

MTerrain is an advanced terrain system and editor for Godot Engine, offering optimized features for large-scale environments up to 16km x 16km. It includes an octree-based LOD system, terrain shaders with various mapping options, navigation integration, grass and path systems, and editor tools for sculpting, painting, and importing/exporting maps. The plugin requires learning specific concepts to use effectively and is not plug-and-play. Users can support the project through Patreon and build it themselves using provided instructions.