From: The World In Your Head by Steven Lehar

Fig. 11.2 Artist Louis Wain, who made a career of painting realistic pictures of cats, was afflicted with a progressive psychosis, which revealed itself in his art by a progressive increase in the symmetry and periodicity of his depictions of cats. (A) First only the textured regions succumb to periodicity. (B) Next, local features such as tufts of fur begin to exhibit more periodicity and similarity to neighboring tufts. (C and D) Finally the entire figure takes on the appearence of an ornamental pattern, characterized by a global symmetry adorned with hierarchical patterns of local symmetry.