Freeze top layer

A freeze top layer is a feature found throughout the Overworld.

Generation
Freeze top layer tries to generate in all chunks in Overworld. In each chunk, it tries at each block column to generate snow or ice on the terrain surface if the height adjusted temprature there is cold enough and the block light level is less than 10. If the surface is water, an ice block replaces the water. And then a snow tries to generate on the surface if it can attach on the surface's block. That means that if the surface is water, both ice and snow generate.

ID




$$, it is not a feature technically. The game simply iterates through each horizonal coordinate after the chuck generation is complete to generate ice and snow.