Created by the Mediated Matter Group and the MIT Media Lab and presented at the recent Milan Design Week, 2017, GLASS II is the group's most recent work in the area of 3D printing optically transparent glass that allows tunability by geometrical and optical variation which drives form, transparency, color variation, reflection and refraction. The new work takes the process one step further, creating a high fidelity, large-scale, additive manufacturing technology for 3D printing optically transparent glass structures at architectural scale.