Creating a lava part using CollectionService

LavaParts.luau

--!strict

local CollectionService = game:GetService("CollectionService")

-- This will be the tag you'll be adding
-- to every part that can damage players
local LAVA_TAG = "Lava"

-- We'll save our connections here so we can clean them up later
local connections: { [BasePart]: RBXScriptConnection } = {}

local function addPart(part: BasePart)
	-- Make sure the instance is a part
	if not part:IsA("BasePart") then
		return
	end

	local connection = part.Touched:Connect(function(hit: BasePart)
		if not hit.Parent then
			return
		end

		local humanoid = hit.Parent:FindFirstChildOfClass("Humanoid")

		-- Make sure the humanoid exists and is alive
		if humanoid and humanoid.Health > 0 then
			humanoid:TakeDamage(humanoid.MaxHealth)
		end
	end)

	-- We want to save our connection
	connections[part] = connection
end

-- This will add a part to the connections table
-- when it is added to the workspace
CollectionService:GetInstanceAddedSignal(LAVA_TAG):Connect(addPart)

-- We want to set up any parts that are already in the world
for _, part in CollectionService:GetTagged(LAVA_TAG) do
	addPart(part)
end

-- Clean up our connections when the script is destroyed
CollectionService:GetInstanceRemovedSignal(LAVA_TAG):Connect(function(part)
	if connections[part] then
		connections[part]:Disconnect()
		connections[part] = nil
	end
end)

setup.md

To set up a lava part you need to create a part in the workspace and add the tag Lava to the new part.

This can be done in 2 ways:

• Select your part, then in the properties panel, find the Tags section and add Lava as a tag.
• With code:

local lavaPart = Instance.new("Part")
lavaPart.Parent = workspace

lavaPart:AddTag("Lava")