Some, including Bietak, claim that the paintings were painted by Minoan artists, while others, like Cline, argue that this cannot be proven and that it may be that the artists just had a deep knowledge of Aegean art. Cline doubts the change in dating by Bietak, and Bietak's argument that the artists were Minoan. Cline says that the “Daba frescoes may simply be an indication that Hyksos artists also adopted aspects of other cultures,” and therefore believes that the artists were not Minoan.[5] However, according to Bietak, the techniques used and the style and motifs employed leave no doubt that the artists were Minoan.[2] The technique of using lime plaster in two layers with a highly polished surface, fresco in combination with stucco, all are techniques that are not Egyptian but are first seen in Minoan paintings.