NoCanCollidePlayers Tutorial

script.Parent = game:GetService("ServerScriptService")
local PhysService = game:GetService("PhysicsService")
local PlayerGroup = PhysService:CreateCollisionGroup("p")
PhysService:CollisionGroupSetCollidable("p", "p", false)

function NoCollide(model)
	for k,v in pairs(model:GetChildren())do
		if v:IsA"BasePart" then
			PhysService:SetPartCollisionGroup(v, "p")
		end
	end
end

game:GetService("Players").PlayerAdded:connect(function(player)
	player.CharacterAdded:connect(function(char)
		char:WaitForChild("HumanoidRootPart")
		char:WaitForChild("Head")
		char:WaitForChild("Humanoid")
        wait(0.1)
        NoCollide(char)
	end)
	if player.Character then
		NoCollide(player.Character)
	end
end)