minecraft-assets/assets/minecraft/models/block/pane_noside.json

{
    "ambientocclusion": false,
    "textures": {
        "particle": "#pane"
    },
    "elements": [
        {   "from": [ 7, 0, 7 ],
            "to": [ 9, 16, 9 ],
            "faces": {
                "north": { "uv": [  9, 0,  7, 16 ], "texture": "#pane" }
            }
        }
    ]
}