William Tucker said the essential quality of sculpture was ‘visibility’. By this he meant not simply that a work could be seen, but that it should actively seek to ‘meet, attract and hold our sight’.
In order to achieve this, Tucker made works that combined apparent simplicity with a complexity that was only gradually revealed. In the 1970s, his works were described as ‘impossible objects’, since they were extremely difficult to hold accurately in the memory despite their simplicity. Viewers were made aware of their own perceptual efforts to understand the form and structure of works such as this.