Terreur Céleste

Terreur Céleste (French for "terror from the sky") is a short written and directed by French filmmaker Jean-Baptiste Coursault. It runs about two and a half minutes and was posted on YouTube by the World AI Film Festival (WAIFF). One night in Paris, a mysterious and menacing presence watches the sleeping city. In the description, the director says it's a self-produced film written and made in a few weeks to test how well different generative AI tools handle fiction, and whether they can keep the images and story consistent. He lists the workflow in detail: almost every shot starts from a still made with Stable Diffusion FLUX 1.0 in ComfyUI; the video comes from Hailuo Minimax, Runway Gen-3 and Kling, with Kling used most because it gave the best control over motion; a few shots were built in 3D in Blender 4.3; editing and compositing were done in After Effects and Premiere Pro; the voice-over was recorded by actor Damien Dufour and processed with ElevenLabs; and the original score by Youri Rebeko was composed without AI. Few films in this space spell out which parts didn't use AI. It was selected for WAIFF 2025's Best AI Film section.

Who it's for:fans of short suspense and horror, and creators who want to compare how several video generators perform in practice.

Before you watch: free on YouTube, about two and a half minutes, and the platform may show ads. The description is in French, and YouTube only offers auto-generated French subtitles, no English; we haven't listened to the voice-over. The film has a suspense and horror mood, and we haven't checked how violent it gets. No reuse rights are granted.

Based on the film's description on WAIFF's official YouTube channel. Watch the film itself for the full picture.