{
    "forge_marker": 1,
    "defaults": {
        "model": "forge:multi-layer",
        "custom": {
          "base": "ffs:blockValve#base",

          "Solid": "ffs:blockValve#base",
          "Translucent": "ffs:blockValve#" <-- I want to have 2 specific sides of the block to have a translucent texture / overlap texture.
          How would I check one of the blockstates of the block, to know which sides have to be rendered?
        },
        "transform": "forge:default-block"
    },
    "variants": {
        "normal": [{}],
        "inventory": [{}],
        "base": [{
            "model": "cube_all",
            "textures": {
              "all": "ffs:blocks/blockValve"
            }
        }]
    }
}