It turns out that if you want something that looks exactly like marijuana for your movie, Tomas Voth is a great resource to have. In this behind-the-scenes look at Savages, director Oliver Stone praises Voth – the production designer – for getting his hands dirty the synthetic way. Making fake marijuana is crucial because using real weed in movies is a federal no-no, but making it look real is a tough job. Watch as Stone explains how they grew fake pot for the flick: