MineAssets/1.17.1/assets/minecraft/blockstates/cave_vines_plant.json

{
  "variants": {
    "berries=false": {
      "model": "minecraft:block/cave_vines_plant"
    },
    "berries=true": {
      "model": "minecraft:block/cave_vines_plant_lit"
    }
  }
}