The 4D style, or cosmic comics and relativistic humor, is based on Einstein's theory of relativity which I came up with 20 years ago. 4D works use the idea of the fourth dimension, time, playing on such surrealistic and amazing subjects as motion relativity, space curvature and time dilation.

Quoted in "Cartoonist Alizadeh, translating world into humor" in Press TV (23 April 2009)