Many of the Donald Perdue's non-bronze castings are made in hydrocal (Odalisgue IV) or various synthetic stone aggregates(such as that used for Oracle III) the the artist has developed. Molds for these works are sometimes also made with the lost wax or "cire perdu" process (also used for Don's bronze sculptures).

Oracle II can be considered a maquette for a potentially much larger piece, yet stands on its own. Additional castings of Reclining Figure IIIc exist, several of which are being finished in color.

By nature, any of these pieces can be reproduced as a series of castings at any point.