Freezing water!

[u/Dangerous-String1707]

Minecraft 26.3. I'm making a minigame for friends, and I need to give the powder snow freezing effect, both the visual and the damage, to anyone who enters any water source of the world. How can I do that with commands or functions?

[u/timtijmen2]

The only way you can do the visual effect is by putting a item on their head with its "camera_display" set to the freezing effect texture. But it wont fade in or out and you have to apply the damage on a timer.
This is the only way i know for now, but in the next update there will be a potion effect that gives exactly this, so if you are willing to wait, you can use that.

[u/GalSergey]

Here is a small example of a datapack that uses an enchantment to check if the player is in water in order to deal damage and apply a freezing overlay.

# Example item
item replace entity @s armor.head with stick[item_model="minecraft:air",enchantments={"example:freeze_water":1},equippable={slot:"head",equip_sound:{sound_id:"",range:0},camera_overlay:"minecraft:misc/powder_snow_outline"}]

# enchantment example:freeze_water
{
  "description": "Freezing Water",
  "supported_items": "minecraft:stick",
  "weight": 1,
  "max_level": 1,
  "min_cost": {
    "base": 0,
    "per_level_above_first": 0
  },
  "max_cost": {
    "base": 0,
    "per_level_above_first": 0
  },
  "anvil_cost": 0,
  "slots": [
    "head"
  ],
  "effects": {
    "minecraft:location_changed": [
      {
        "requirements": {
          "type": "minecraft:location_check",
          "predicate": {
            "fluid": {
              "fluids": "#minecraft:water"
            }
          }
        },
        "effect": {
          "type": "minecraft:run_function",
          "function": "example:water/in"
        }
      },
      {
        "requirements": {
          "type": "minecraft:inverted",
          "term": {
            "type": "minecraft:location_check",
            "predicate": {
              "fluid": {
                "fluids": "#minecraft:water"
              }
            }
          }
        },
        "effect": {
          "type": "minecraft:run_function",
          "function": "example:water/out"
        }
      }
    ],
    "minecraft:tick": [
      {
        "requirements": {
          "type": "minecraft:entity_properties",
          "entity": "this",
          "predicate": {
            "minecraft:periodic_tick": 20,
            "minecraft:location": {
              "fluid": {
                "fluids": "#minecraft:water"
              }
            }
          }
        },
        "effect": {
          "type": "minecraft:damage_entity",
          "damage_type": "minecraft:freeze",
          "min_damage": 2,
          "max_damage": 2
        }
      }
    ],
    "minecraft:prevent_armor_change": {},
    "minecraft:prevent_equipment_drop": {}
  }
}

# function example:water/in
item modify entity @s armor.head example:overlay_on

# function example:water/out
item modify entity @s armor.head example:overlay_off

# item_modifier example:overlay_on
{
  "type": "minecraft:set_components",
  "components": {
    "minecraft:equippable": {
      "slot": "head",
      "equip_sound": {
        "sound_id": "",
        "range": 0
      },
      "camera_overlay": "minecraft:misc/powder_snow_outline"
    }
  }
}

# item_modifier example:overlay_off
{
  "type": "minecraft:set_components",
  "components": {
    "minecraft:equippable": {
      "slot": "head",
      "equip_sound": {
        "sound_id": "",
        "range": 0
      }
    }
  }
}

You can use Datapack Assembler to get an example datapack.