Something similar was proposed back when 3d printing as we know it today was getting started in the 1980s. Two lasers were shined through a photocurable resin s

Something similar was proposed back when 3d printing as we know it today was getting started in the 1980s. Two lasers were shined through a photocurable resin so that the resin would cure at the interesection[0](see figure 9). In practice it never worked and the resin cured before intersecting leading to nasty blobs rather than parts. It seems that now that we understand the kinetics of photocuring better and that we have massive amounts of computer that we're able to use these approaches. Processes that cure resin have a lot of potential because resolution can potentially be on the order of that of the wavelength of light. [0]https://pdfs.semanticscholar.org/4716/c69f0b90a158589e54248a524a57ad78f4a3.pdf https://pdfs.semanticscholar.org/4716/c69f0b90a158589e54248a...