Shrinks the hover box in Roblox Studio when you get closer to it

HoverThickness.lua

local CoreGui = game:GetService("CoreGui")
local MIN_THICKNESS = 0.001
local MAX_THICKNESS = 0.04
local MIN_DIST = 2
local MAX_DIST = 10

game:GetService("RunService").Heartbeat:Connect(function()
	local hoverBox = CoreGui:FindFirstChild("HoverBox")
	if hoverBox and hoverBox:IsA("SelectionBox") then
		local adornee = hoverBox.Adornee
		if adornee then
			local position

			if adornee:IsA("BasePart") then
				position = adornee.Position
			elseif adornee:IsA("Model") then
				local primaryPart = adornee.PrimaryPart
				if primaryPart then
					position = primaryPart.Position
				else
					local part = adornee:FindFirstChildWhichIsA("BasePart", true)
					if part then
						position = part.Position
					end
				end
			elseif adornee:IsA("WeldConstraint") or adornee:IsA("NoCollisionConstraint") then
				position = adornee.Part0.Position
			end

			if position then
				local camDist = (workspace.CurrentCamera.CFrame.Position - position).Magnitude
				local thickness = MIN_THICKNESS + (MAX_THICKNESS - MIN_THICKNESS) * math.clamp((camDist - MIN_DIST) / (MAX_DIST - MIN_DIST), 0, 1)
				if hoverBox.LineThickness ~= thickness then
					hoverBox.LineThickness = thickness
				end
			end
		end
	end
end)