Improve Your Obbies Part 1

local PhysicsService = game:GetService("PhysicsService")
local Players = game:GetService("Players")

PhysicsService:RegisterCollisionGroup("Characters")
PhysicsService:CollisionGroupSetCollidable("Characters", "Characters", false)

Players.PlayerAdded:Connect(function(player)

    player.CharacterAdded:Connect(function(Character)

        for _, Part in pairs(Character:GetDescendants()) do

            if Part:IsA("BasePart") then

                Part.CollisionGroup = "Characters"

            end

        end

        Character.DescendantAdded:Connect(function(Part)

            if Part:IsA("BasePart") then

                Part.CollisionGroup = "Characters"

            end

        end)

    end)

end)