I always wondered if this would work, but researchers at Lawrence Livermore National Labs have demonstrated that it can. They illuminated a tank full of photo-catalyzed resin with 3 matching holograms reflecting high-powered laser light into the same space. The result was an object produced more or less immediately as a whole part - no layers, no support necessary. Read about it here: https://singularityhub.com/2017/12/0...0vf11hmfc6dco9