You could call 'A Cloud Collision Walkthrough' an exhibition of sculptures. And yet there is only one freestanding sculpture to be seen. Supported by a table-like plinth, Gerard Koek’s (1954, NL) sculpture ‘Beholder’s Eye’ with its brightly-coloured branches seems to be rising up out of the floor. Or is it sinking into it? Toni van Tiel (1979, NL) is a sculptor on paper. In his drawings, he creates monuments, fountains, and roundabouts: sculptures in imaginary public spaces. Toni feels no need to realize these sculptures in three dimensions. They exist on paper, and the viewer’s imagination does the rest.