Rittstein expands on his interactions with the Yali Mek tribe through conceptual metaphorical sculptures, which he invites the tribal chiefs to explore To close the Ultra-Super-Natural series, sculptor Lukáš Rittstein (born 1973) creates metaphorical sculptures balanced between reality and abstraction. Accompanied by his stories of encounters with the Papuan Yali Mek tribe, Rittstein imagines how the chiefs would perceive these conceptual works.