2017: the "Signs-in-Colors" exhibition with collaboration Hsing-Chuen and Roy, Gallery R4L, SEon, Switzerland.
2019, exhibition "Signs in Colors 2" - Rolf and Roy, Gallery R4L, Seon, Switzerland
Rightside: background images during concert with the Dillberg band (Rolf is on the very right hand side with e-bass).
2006: Roy's paintings at  the "Water-Power-Works" exhibition with Seppi Gasser at the old but still producing hydroelectric power plant near Lucerne, Switzerland.
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