Post Processing_Atlas

{
    "type": "atlas",
    "from": "assets/namespace/textures-atlas",
    "to": "assets/namespace/textures",
    "templates": {
        "_up": { "x": 16, "y": 0, "width": 16, "height": 16 },

        "_east": { "x": 0, "y": 16, "width": 16, "height": 16 },
        "_north": { "x": 16, "y": 16, "width": 16, "height": 16 },
        "_west": { "x": 32, "y": 16, "width": 16, "height": 16 },
        "_south": { "x": 48, "y": 16, "width": 16, "height": 16 },

        "_down": { "x": 16, "y": 32, "width": 16, "height": 16 }
    }
}

This post processing pass cut the textures atlas into multiple textures. Pretty useful for making multiple faces block textures. Each entry in templates have the texture suffix, which is the key of the object and the template info, which is the object:

{
    "x": 0, "y": 0,
    "width": 16, "height": 16
}