Cycles of "Reineke Fuchs", "A Midsummer Night's Dream", "Macbeth", "Don Quixote", "La Belle et la Bête", "Chevalier de Florian" or Afghan fairy tales bear witness to Dunkel's love of drawing, which sought inspiration from epic, novel and drama.
From the tradition he chose preferentially the death theme. Keywords are, for example, knights, death and the devil; death and the girl; the dance of death; the blood court. Dunkel exemplified the fight with a fatal outcome in the ritual of the bullfight on his numerous sheets on "Death in the Afternoon".
Within the biblical tradition, the draftsman was preoccupied with the following topoi: the Fall of Man and the Expulsion from Paradise, Golgotha, the Resurrection, the Fall from Hell, Ester and Salome, Anthony and Christopher.
Since 1976 he has created landscape drawings and nature pieces exclusively plein-air in the French Jura. The depictions of horses and riders form a further complex of works. Animal studies based on nature occupy only a marginal place in Dunkel's oeuvre of drawings.