Using Codex with GPT image 2.5 to complete character + environment asset images is just way too convenient.
Even background actors can achieve a thousand different faces!
No need to prepare complicated prompts—just have it design and generate character and scene images based on the new storyline you want to create (new AI video prompt).
Background character (supporting role) generation instruction:
Based on the storyline and environment settings, help me generate an image of a group of common civilian characters; then generate another background character image, where clothing and style can vary, and it can even include aliens.
Scene image + generation instruction:
Generate a scene image of a long street from the reverse shot of the previous scene image, maintaining the same architectural style as the original image.
The last image is the original scene image.