Parallel to a studio-based practice and the slow reconstruction of his archive, Orta began experimenting with the technology for large-scale image projection Light Works in the early 1980s and invented the Pyrex image plates for the PAE (Projector Art Effect) projectors. Exploring light as a new medium, he painted and illuminated mythical sites of architecture of cultural and historical significance across the world: Mount Aso (Japan), Cappadocia (Turkey), Zócalo (Mexico City), and Verdon Gorge (France). In 1995 he represented Argentina at the Biennale di Venezia with Light Works staged on Venetian Palaces along the Grand Canal (Venice)|Grand Canal. The most exceptional Light Work took place in 1992 during a three-week expedition along the Andes mountain range and culminated at the Inca vestiges of Machu Picchu and Sacsayhuamán to partake in the Inti Raymi in front of 200,000 Peruvian Indians.