An example of psycho-sculpture. (COMIC: The World Shapers)
Psycho-sculpture was an art form.
Newer models of TARDISes from the Sixth Doctor's time usually had what he considered gaudy and ostentatious examples of psycho-sculpture. Peri, however, admired the crystalline interior of a TARDIS they encountered on Marinus. (COMIC: The World Shapers)
The Telphin were considered masters of this art. (COMIC: Memorial)