Over the past decade there has been a renewed interest in the practice of casting, which once again brings together the artistic and industrial worlds. Casting in plaster has never gone away, but the repertoire has now been enlarged. Casts of all kinds proliferate in our daily lives, and artists avail themselves of newly available digital techniques and artificial materials. Casts embody the special but unseen quality of almost all sculpture: that it is more often serial than unique. Sculpture is inherently plural and casting makes it so.