Some artists of the time are also experimenting with impossible figures , for example , Jos de Mey , Shigeo Fukuda , Sandro del Prete , IstvÃ n Orosz ( Utisz ) , Guido Moretti , TamÃ s F. Farkas and Mathieu Hamaekers . Some contemporary artists are also experimenting with impossible figures , for example , Jos de Mey , Shigeo Fukuda , Sandro del Prete , IstvÃ n Orosz ( Utisz ) , Guido Moretti , TamÃ s F. Farkas and Mathieu Hamaekers .