Starting with figurative work of an expressionist nature, in the mid-1950s Alcoy was a founding member of the Sílex Group and turned more towards geometric abstraction and informalism. In 1963 he ended his informalist period to return to figuration with work of a decidedly dreamlike character. Later, in the 1970s, he quit advertising and graphic design to concentrate on painting, while at the same time broadening his artistic remit to include other forms of expression, such as sculpture and jewellery. Up until his early death, his works of magical figuration displayed a range of constants such as landscape, madness, apocalypse and chaos.