Test :D

local test = false

function wow(player)
if isPedInVehicle(player) then
if test == false then
local veh = getPedOccupiedVehicle(player)
setElementAlpha(veh, 0)
test = true
elseif test == true then
local veh = getPedOccupiedVehicle(player)
setElementAlpha(veh, 255)
test = false
else
outputDebugString('Es ist ein Fehler aufgetreten')
end
end
end

addCommandHandler('unsichtbar' , wow)

-- Test
local gMe = getLocalPlayer()

function trololo()
for id, player in ipairs(getElementsByType("vehicle")) do
if player ~= gMe then
setElementAlpha(player, 0)
else
setElementAlpha(player, 255)
end
end
end

bindKey('F1', 'down', trololo)