How can i make the mouse not hit a part?

local localPlayer = Players.LocalPlayer

local mouse = localPlayer:GetMouse()

local preview = Instance.new("Part")

preview.Parent = game.Workspace

preview.Size = Vector3.new(tostring(setX), tostring(setY), tostring(setZ))

preview.Color = Color3.fromRGB(0, 10, 50)

preview.Transparency = 0.6

preview.Name = 'Preview'

preview.CanCollide = false

preview.Anchored = true

while wait(0.1) do

	local finish = mouse.Hit.p

	preview.Position = finish + Vector3.new(0, setY / 2, 0)

end

how can i make mouse not hit preview

You can use the TargetFilter property of the mouse so you can do something like this:

mouse.TargetFilter = preview