pure invention de
What he saw wasn't a ghost but just a figment of his imagination.
Ce qu’il a vu n’était pas un fantôme, mais seulement le fruit de son imagination.
It's just a figment of your imagination.
Ce n’est qu’un fruit de ton imagination.
This is a mere figment of your imagination.
Ce n’est qu’une pure invention de ton imagination.
Modern man is a figment of your imagination.
L'homme moderne est un produit de votre imagination.
— Wild Strawberries (1957)