Raycast returns nil?

[SyloneSchrater (Sylone)]

function Update()
	local ClientLadder = ReplicatedStorage:WaitForChild("Ladder"):Clone()
	ClientLadder.Parent = LadderPlacedFolder
	ClientLadder.Name = Players.Name.."_ladder"
	local Render
	Render = RunService.RenderStepped:Connect(function()
		local Character = Players.LocalPlayer.Character
		local HumanoidRootPart = Character:WaitForChild("HumanoidRootPart")
		local Raycastparams = RaycastParams.new()
		Raycastparams.FilterType = Enum.RaycastFilterType.Whitelist
		Raycastparams.FilterDescendantsInstances = {workspace.Map}
		if ClientLadder and HumanoidRootPart then
			local Raycast = workspace:Raycast(HumanoidRootPart.Position,(ClientLadder.Main.Position-HumanoidRootPart.Position).Unit*10,Raycastparams)
			print(Raycast) -- returns nil
			if Raycast ~= nil then
				-- do something
			end
		end
	end)
end

[ThanksRoBama (Emma)]

Yes, it’s on the wiki:

Casts a ray using an origin, direction, and optional RaycastParams. If it finds an eligible BasePart or Terrain cell, a RaycastResult is returned containing the results of the operation. If no RaycastParams object is provided, the defaults are used (all parts are considered and Terrain water is not ignored).
- WorldRoot | Roblox Creator Documentation

[Chaos_Geo]

Raycasts return nil when they don’t hit anything.
It appears that your raycasts aren’t hitting anything, so they will return nil.
Another thing to note is that you could just use if raycast rather than if raycast ~= nil