Psycho-sculpture

Psycho-sculpture was an art form.

Newer models of TARDIS 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. (DWM: The World Shapers)

The Telphin were considered masters of this art. (DWM: Memorial)