Why doesn't the label text doesn't change to raycasted object name?

Problem

This is something I seen most people do. First you need to understand what StarterGui is. StarterGui is basically a container for all the GUIs in your game. When a Player joins the Server it will replicate all those GUIs in StarterGui to the Player's PlayerGui where it will be displayed for that player.

So the question is "How do I get the Player's PlayerGui?".

Solution

We can get the Player

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

The PlayerGui is the child of the Player

local player = game:GetService("Players").LocalPlayer
local label =  player:WaitForChild("PlayerGui"):WaitForChild("guistuff"):WaitForChild("WhatYouLookinAt")

I would rather use heartbeat instead of renderstepped.

Fixed code

local player = game:GetService("Players").LocalPlayer
local label =  player:WaitForChild("PlayerGui"):WaitForChild("guistuff"):WaitForChild("WhatYouLookinAt")
local runservice = game:GetService("RunService")

local raycastParams = RaycastParams.new() -- RaycastParams I think is short for raycastparameters, pretty self explanatory.
raycastParams.FilterType = Enum.RaycastFilterType.BlackList --Setting filter type to blacklist
raycastParams.FilterDescendantsInstances = {player.Character} -- filtering the descendants of the character.


local function MouseRaycast()
        local mousePos = uis:GetMouseLocation()
        local mouseRay = cam:ViewportPointToRay(mousePos.X, mousePos.Y)
        local rayResult = workspace:Raycast(mouseRay.Origin, mouseRay.Direction * 20, raycastParams)
        return rayResult
end

runservice.Heartbeat:Connect(function()
    local result = MouseRaycast()
    if result and result.Instance then
        local objname = result.Instance.Name
        label.Text = objname
    end
end)

If the code doesn't work you can tell me.