Moore's signature form is a reclining figure. Moore's exploration of this form, under the influence of the Toltec-Mayan figure he had seen at the Louvre, was to lead him to increasing abstraction as he turned his thoughts towards experimentation with the elements of design. Moore's earlier reclining figures deal principally with mass, while his later ones contrast the solid elements of the sculpture with the space, not only round them but generally through them as he pierced the forms with openings.
Earlier figures are pierced in a conventional manner, in which bent limbs separate from and rejoin the body. The later, more abstract figures are often penetrated by spaces directly through the body, by which means Moore explores and alternates concave and convex shapes. These more extreme piercings developed in parallel with Barbara Hepworth's sculptures.[36] Hepworth first pierced a torso after misreading a review of one of Henry Moore's early shows. The plaster Reclining Figure: Festival (1951) in the Tate, is characteristic of Moore's later sculptures: an abstract female figure intercut with voids. As with much of the post-War work, there are several bronze casts of this sculpture. When Moore's niece asked why his sculptures had such simple titles, he replied,