Blue optical illusion place mat

This special plastic sheet shows two optical illusions. Firstly, the central disc seems to move when you alter your position. Secondly, the flat mat appears to be printed as a 3D mat: the 30mm border around the edges of the mat seem closest to the viewer, then comes the circular design in the centre of the mat, and further away still is the rest of the mat. It’s all very confusing! The concept is Copyright Paul Baars Design, Amsterdam. There are four place mats in this series – see also N2237, N2238 and N2239.