https://github.com/alex-karev/godot-simple-procedural-terrain

An open-source tool that helps to generate 3d terrains using your own generator script. It does all the hard job of generating 3d mesh with normals, UVs, collision shapes, multiple materials and chunk system while you can focus on writing a good generator script.

Does not generate terrain by itself. Instead, it uses your own custom generator node, which makes it easier to focus on logic

Implements chunk system

Uses tilesheet

Supports multiple materials

Height and tile index can be defined separately, which enables multiple biomes support

Has 2 generation modes: with and without using marching squares

100% GDscript