Can you see the Felius Catus aka the house cat, domestic cat, or just plain cat at the window? I am sure you can. If you didn’t then you are not alone and that is the style of the famous Swiss artist Sandor del Prete. Abraham Tamir is quoted in Wikipedia as saying Sandor del Prete ‘materializes the well-known psychological effect, of the difference between ‘looking’ (usually the first glace of an observer) and ‘seeing’ (when things are appreciated more thoroughly in the mind). The Cat at the Window is one of my favorite artworks or optical illusions of del Prete as it took me some considerable time to get past the bushy plant on the top shelf, the stockings hung out to dry like a used man, and even the well shaped glass of sippable wine on the window ledge. Once you overcome these physiological blocks you too will see the cat.
I am sure you are familiar with the work of Sandor del Prete and you can see more at his website – sandrodelprete.com