Curvilinear perspective is a graphical projection used to draw 3D objects on 2D surfaces.

Spectasia employs a curvilinear perspective grid, referred to as a "Data Wave", in order to present Item Choices to the user.

Other publications include A Treatise of Curvilinear Perspectives and its applications to Art published in 1854 and Thoughts on Speculative cosmology and the principles of Art published in 1870.

Already influenced by the engravings of Maurits Escher and Flake's treatise on curvilinear perspective, he has exhibited at the Palais de la Decouverte and the Institute Henri Poincaré.

A curvilinear perspective is a drawing with either 4 or 5 vanishing points, in 5-point perspective the vanishing points are mapped into a circle with 4 vanishing points at the cardinal headings N,W,S,E and one at the circle origin.

It is noteworthy that Spectasia uses curvilinear perspective to present item choices to the user, being a form of perspective which has been ably described in the book Curvilinear Perspective: From Visual Space to the Constructed Image.