I am trying to detect if the mouse.Target is "Top" then, I want the part to be placed on top.

Local Script

local player = game:GetService("Players").LocalPlayer
local mouse = player:GetMouse() 

local grass = script.Blocks.GrassBlock
local grassClone = grass:Clone()
grassClone.Parent = game.Workspace
local grid = 3
local finalPos = CFrame.new()

local event = game.ReplicatedStorage:WaitForChild("RemoteEvent")

mouse.Button1Down:Connect(function()
	
	grassClone.PrimaryPart = grassClone.Hitbox
	grassClone.PrimaryPart.BrickColor = BrickColor.White()
	grassClone.PrimaryPart.Transparency = 0.9
	
	local floorX = math.floor(mouse.Hit.X / grid + 0.5) * grid
	local floorZ = math.floor(mouse.Hit.Z / grid + 0.5) * grid
	finalPos = CFrame.new(floorX, 3, floorZ)
	
	event:FireServer("GrassBlock", finalPos)
end)

Server Script

local event = game.ReplicatedStorage:WaitForChild("RemoteEvent")
local blocks = game.StarterGui.PlacementNoMouse.Blocks


local function test(player, block, pos)
	p = blocks:FindFirstChild(block):Clone() -- leave this var. without local
	p.Parent = game.Workspace
	p:SetPrimaryPartCFrame(pos)	
	p.PrimaryPart.Name = "Destroyable"
	
	local part = Instance.new("Part", p)
	part.Size = Vector3.new(3, 0.5, 3)
	part.Position = p.PrimaryPart.Position + Vector3.new(0, 1.5, 0)
	part.Anchored = true
	part.Name = "Top"
end

event.OnServerEvent:Connect(test)

Thanks for the Help!

Anonymous