Cube World's Voxel Terrain

Hey! So, I was wondering how to achieve something like Cube World’s voxel terrain generation, take the image as an example

It is long and flat like the image, and it generates mountains with heightmap.
I have a script which generates voxel terrain, but the terrain that it generates is completely different, thanks for help in advance.

I’ve seen people use Perlin noise to get mountains and valleys. You could try that and mess around with the settings till it looks right.

3D perlin noise is the thing for you, watch This and This