This short prompt lets Claude Code freely choose a subject and make an approximately 70-second film within an existing Riso art project, but the result depends on the documentation, examples, and tools provided by the repository.
Suitable tasks: Creating a Riso-style short film inside a project with an existing creative scaffold and reference work, and finding free instrument sound effects for its score.
Not suitable for: Reproducing the train film, its overall production quality, or its workflow in an empty directory using only this one sentence.
Applicable model version: Claude Opus 5.5 (the original poster says this model made the main video; a comment applies this prompt to the bonus output).
Applicable client, agent, or API: Claude Code; the author recommends cloning the project and starting the session from the repository root.
Recommended reasoning level and parameters: Not specified.
The author shared this original prompt, with its spelling and punctuation preserved:
Lets make a ~70s riso film of your own choosing, free range. The project docs here for this session are for support and examples, but you're not required to follow them. Find and use free instrument sound effects when making the score for this filmClone the author's riso-windowseat repository. The repository README says it contains Claude Code skills, creative documentation, tools, and examples of completed work.
Follow the README instructions to install dependencies in the tools directory, run the setup and test commands, and then open Claude Code from the repository root.
Submit the original prompt above. Let the model choose a subject freely and create an approximately 70-second short film while finding free instrument sound effects for the score.
In a comment, the author says the prompt is simple because the project repository already contains documentation and examples; the train-window video in the original post is a separate work. The original post says that video took about 45 minutes to make, while the repository README describes it as a 78-second procedural train-journey short film. The bonus in the comment was a separate generation: the author says it took about 30 minutes and shows a title card reading “Herboristerie.”
The Reddit post says Opus 5.5 generated the train-journey work in a single run that took about 45 minutes, and links directly to the riso-windowseat repository. The video's metadata lists a duration of 78 seconds.
In the author's comment with the bonus output, they shared the 70-second prompt above, said that generation took about 30 minutes, and attached a video. The comment provides no additional model parameters or run logs.
The repository README describes the main work as a 78-second procedural risograph train-journey film and explicitly lists Claude Code skills, docs, tools, and example films. Its startup procedure is to clone the repository, install dependencies and run setup/tests in tools, then start Claude Code from the repository root.
Reddit commenters also say the existing project's skills and context documents are important to the result. This is the author's explanation of the role of project context, not a controlled test isolating variables.
What can be reused is this short prompt and the project context shown by the author. This does not establish that the bare prompt would produce the same result in an empty project.
The train film and the Herboristerie bonus are two separate works. The 70-second prompt corresponds to the latter and should not be labeled as the original prompt for the train film.
The author's reported durations of 45 minutes and 30 minutes are personal statements. No timing method, model parameters, iteration count, or cost data was disclosed.
“Riso” is the author's term for the visual style; some commenters said the images looked closer to a halftone effect. The work should not be treated as evidence of a strict reproduction of the risograph printing process.
Use the same documentation, skills, examples, and tools in the repository, then submit the prompt to Claude Code. Record the model identifier, client version, dependency installation status, whether project files were changed, total time, output video, and audio sources. To reproduce the train film, inspect the work in films/window-seat/ and its FILM.md design notes in the repository; do not claim that using the bonus prompt reproduces the main work.
Claude Opus 5.5