You can also sinter sand into 3d structures. https://www.youtube.com/watch?v=ptUj8JRAYu8 https://www.youtube.com/watch?v=ptUj8JRAYu8 In theory if you could ma

You can also sinter sand into 3d structures. https://www.youtube.com/watch?v=ptUj8JRAYu8 https://www.youtube.com/watch?v=ptUj8JRAYu8 In theory if you could manufacture lenses and optical fibers, you could 3d print active solar powered structures anywhere where there is enough sun. Imagine a 3d printed little bottlegarden, with a water collector using a heated silicagel cycle printed in situ on mars. Still low atmospheric pressure, but warm and wetter.