The next generation of large telescopes will need Multiconjugate Adaptive Optics. But will this new technique work? 30 Dor is one of the regions that always reminds me of how little we know about star formation. It is an impressive star factory, unlike any of our Milkyway, and it is also the perfect target to test Multiconjugate Adaptive optics Demonstrator (MAD) at the Very Large Telescope, with the Near-Infrared camera CAMCAO. The technique works, and the paper presenting first results, that contradict results from optical wavelengths, is here.