ttt-glowing-teammates/lua/autorun/client/glowing_teammates.lua

local tttGlowingDetective = CreateConVar("ttt_glowing_detective", "1", {FCVAR_SERVER_CAN_EXECUTE, FCVAR_ARCHIVE, FCVAR_NOTIFY}, "Should the detective be seen through walls?"):GetBool();

local function GlowingTTT()
	local mates = {}
	local ply = LocalPlayer()

	if ply.GetTeam then
		for k, v in pairs(player.GetAll()) do
			if v ~= ply and v:IsActive() and ply:IsSpecial() and not v:IsInnocent() and ((v:GetTeam() == ply:GetTeam() and not ply:GetDetective()) or (v:GetRole() == ply:GetRole())) and (not TTT2 or ply:GetSubRole() ~= ROLE_SHINIGAMI) then
				table.insert(mates, v)
			end
		end
	else
		for k, v in pairs(player.GetAll()) do
			if v:IsActiveTraitor() and v ~= ply then
				table.insert(mates, v)
			elseif tttGlowingDetective and v:IsActiveDetective() and v ~= ply then
				table.insert(mates, v)
			end
		end
	end

	if #mates == 0 then return end

	for _, v in pairs(mates) do
		local clr = Color(255, 0, 0)
		if v.GetRoleTable and v:GetRoleTable().DefaultColor then
			clr = v:GetRoleTable().DefaultColor
		elseif v.GetRoleColor and v:GetRoleColor() then
			clr = v:GetRoleColor()
		elseif v:IsTraitor() then
			clr = Color(255, 0, 0)
		elseif v:IsDetective() then
			clr = Color(0, 0, 255)
		end

		if TTT2 then
			outline.Add(v, clr, OUTLINE_MODE_VISIBLE)
		else
			halo.Add({ v }, clr, 0, 0, 3, true, true)
		end
	end

end

local function CheckTTTGlow()
	if gamemode.Get("terrortown") then
		hook.Add("PreDrawHalos", "AddTTTTeamGlow", GlowingTTT)
	end
end
hook.Add("PostGamemodeLoaded", "LoadTTTTeamGlow", CheckTTTGlow)