Paper can be cut, dyed, made, written on, painted on, folded, torn, and a number of other things, but it can also be manipulated with heavy pressing. Embossing and debossing manipulates the surface of the paper using pressure and heat. In Schubert’s work, the paper was manipulated to create detailed 3-dimensional scenes. See more of Schubert’s embossed works here.
Image Source: http://www.simonschubert.de/papierarbeiten.html