Tellus is a procedural terrain generator based on Perlin noise, creating various terrains as a grid separating them into 1, 2x2, 3x3, 4x4 8x8 seam up perfectly, each one a square size.

Able adding details and objects through some simple parameters. This makes it easy to configure to separate it into scenes that can be loaded additively.

It also comes with a triplanar shader that has snow that can be easily controlled by parameters.

Tellus can generate heights, to the mountains and the plains using a Random.Seed and perlin to ensure the same repetition when using the same seed noise, it is also capable of generating the alpha Maps or splat maps based on the terrain inclinations time. also generates the details and trees, based on Perlin,

Official Website
WebGL Demo
Video Tutorial