overworld_slab2.json

{
    "forge_marker": 1,
    "defaults": {
        "transform": "forge:default-block",
        "model": "half_slab",
        "textures": {
            "bottom": "#all",
            "top": "#all",
            "side": "#all",
            "particle": "#all"
        }
    },
    "variants": {
        "type": {
            "eucalyptus": {
                "textures": { "all": "natura:blocks/planks/overworld/eucalyptus_planks" }
            },
            "hopseed": {
                "textures": { "all": "natura:blocks/planks/overworld/hopseed_planks" }
            },
            "sakura": {
                "textures": { "all": "natura:blocks/planks/overworld/sakura_planks" }
            },
            "redwood": {
                "textures": { "all": "natura:blocks/planks/overworld/redwood_planks" }
            }
        },
        "half": {
            "bottom": {},
            "top": {
                "model": "upper_slab"
            }
        }
    }
}