George Lucas may have thought up the Star Wars series, but it would have looked very different without the imaginative breadth of the conceptual artist Ralph McQuarrie, who has died aged 82. McQuarrie's style was characterised by competing strains of industrial realism and aesthetic grandeur. "I've always had sort of a dreamworld approach to sitting and sketching for myself," he said. "I go for the romantic and what looks interesting while half my mind is occupied with practicality."