An image generation system includes a captured image acquisition section that acquires a captured image captured by an imaging section, a depth information acquisition section that acquires depth information about a photographic object observed within the captured image, an object processing section that performs a process that determines a positional relationship between the photographic object and a virtual object in a depth direction based on the acquired depth information, and synthesizes the virtual object with the captured image, and an image generation section that generates an image in which the virtual object is synthesized with the captured image.