NaturesAura/src/main/resources/assets/naturesaura/blockstates/hopper_upgrade.json

{
    "forge_marker": 1,
    "defaults": {
        "model": "minecraft:cube_all",
        "textures": {
            "all": "naturesaura:blocks/hopper_upgrade"
        },
        "transform": "forge:default-block"
    },
    "variants": {
        "normal": [{}],
        "inventory": [{}]
    }
}