Eusebio Sempere was one of the main practitioners of and Op and Kinetic art in Spain. His uniquely beautiful work is the outcome of a continual striving towards geometric simplification, movement and optical illusion.

Sempere worked across a whole range of media including drawing, watercolour, oil painting, , silk-screen and lithography, as well as sculpture, which he used to explore his ongoing research into light, movement and geometry of volumes in three dimensions.

When transformed into matter, the fine, accurate lines we see in his painting and printmaking seem to gravitate, apparently weightless, in the air.

The geometric form is simplified to the utmost: a number of cylindrical or quadrangular rods arranged in parallel (as in the case of this Estructuras superpuestas) or perpendicularly are connected along a central axis that allows them to move independently. The simplicity and the effectiveness of the structure open up infinite variations in terms of form, the light it irradiates and the movement, which changes depending on the position of the spectator and produces a

 moiré 

the moiré effect or moiré pattern is a visual effect generated by overlaying two grids of lines at an angle or when the grids have slightly different mesh sizes. The origin of the expression comes from a type of silk or fabric with a rippled, “watered” effect.

effect.