In the following decade, Clément furthered his reputation with a series of excellent, highly acclaimed films, including Au-delà des grilles (1948), Le château de verre (1950), Jeux interdits (1952), Monsieur Ripois (1954) and Gervaise (1956). He won Oscars for Au-delà des grilles and Jeux interdits and another award at Cannes for Monsieur Ripois.
Clément's cinema showed a great diversity, both in content and technical presentation, suggesting a director with great confidence in his ability and perhaps more than a touch of courage in taking a gamble. What perhaps most characterises his films is a sense of cold detachment, placing him in the role of a casual bystander, perhaps a voyeur, rather than an auteur with something to say directly to the world. He almost leaves it entirely to his actors to form a bond of attachment with his audience, an approach which works with devastating effect in Jeux interdits and Gervaise, his most poignant films.
In the 1960s, Clément's cinema was soon overtaken with the emergence of the New Wave and his career began its slow decline. The decade began well enough with Plein Soleil, his adaptation of a Patricia Highsmith thriller. With sumptuous location work and an exemplary performance from a fresh young actor, Alain Delon, the film was a great success and is still regarded as a classic. However, the disastrous Paris brûle-t-il? , in which Clément attempted to make a Hollywod blockbuster-style war film, with a star-studded cast, quickly put the breaks on Clément's career. His subsequent films were scarcely noticed, although each reflected the hand of a competent and inspirational film maker. René Clément died in Monaco in March 1996.