Free Godot 4.6 Addon: HTerrain Heightmap Terrain Plugin (Zylann)

Overview

Marc Gilleron (Zylann) shares a heightmap-based terrain plugin for Godot 4.6+. It supports texture painting, colouring, holes, level of detail and grass, and the README states that it is fully implemented in GDScript with no GDExtension part.

Older versions for Godot 3.x and Godot 3.0.6 are kept on separate branches, and the author notes the plugin now only receives bug fixes but should be stable. The MIT-licensed plugin is a free download from GitHub.