How to Define AI Characters Professionally? NadouPro Guide: Build AI Actors Like a Casting Director

Anyone who has made a film knows that casting sets the ceiling for a project. If the character does not hold up, even the best script falls flat. In a traditional workflow, casting means budget, schedules, and endless rounds of auditions. In AI filmmaking, the bottleneck takes a different form: characters “change faces” between shots, skin texture turns plastic, and emotions feel pasted on. NadouPro’s approach is to make casting itself part of the creative workflow: define the person first, then start production.

Why AI Characters Always Look Like “Plastic Faces”

Most AI video tools follow the default path of “generate a video directly from one prompt.” The character never goes through an independent design stage, so every shot is the model improvising. The result: skin looks waxy in close-ups, facial features drift in wide shots, and two shots placed together look like two different people.

NadouPro’s Workbench solves this with a structured “script → subject → storyboard → production” workflow. The subject, meaning the character, is an independent design step that exists before the storyboard and the finished video. At this stage, you lock down the character’s appearance, temperament, clothing, and relationship to the scene. Every later shot is generated from this design, so consistency is controlled at the source.

Think Like a Casting Director

A professional casting director looks at more than whether someone is “good-looking.” They look at the relationship between the character and the story. When you bring this way of thinking into NadouPro, character design can unfold across three dimensions:

• Narrative role: What function does this character serve in the story? Protagonist, opponent, guide, or utility character? The role determines the density of the performance and the distribution of shots.

• Era and style: Which time period and visual tradition does the character belong to? A 1940s detective film and a contemporary urban drama have completely different logic for fabric, hairstyle, and lighting.

• Identifying details: A scar, a pair of glasses, a signature coat. The more specific the details, the easier the character is for the audience to remember and the easier it is for AI to reproduce consistently.

Take a typical scene as an example: you are making a suspense short film set in the 1990s, and the protagonist is a down-and-out detective around 40, slightly overweight, with a faint scar on his face, who has worn the same faded leather jacket for years. When this information is clearly written during the subject design stage, the generated character three-view can become the anchor for the entire film.

Character Three-View: An Extra Layer of Insurance for the Project

Among NadouPro’s Multi-Grid capabilities, the character three-view is the most practical tool at the character design stage. Generating front, side, and back views of the finalized look in one go is like building a character file for the project:

• The front view locks down facial features and expression.

• The side view explains silhouette and body shape.

• The back view completes the hairstyle and clothing structure.

The value of this file lies in reusability. When generating storyboards and producing video later, feed the three-view into Image Fusion mode or multi-reference input as reference images. The model then has a stable identity anchor, giving you a handle for preventing face changes across shots. The expression 9-grid is an extension of this: nine emotional states are generated at once, ready to choose from during editing, immediately adding layers to the performance.

Who Is Using This Approach

Independent creators: Making a short film alone with no casting budget. In NadouPro, you can first create two or three subjects, complete their three-views, then move into storyboarding and production. One person becomes a whole crew.

Series content operators: For serialized short videos or programs, the audience’s familiarity with “old faces” is what supports retention. Define the protagonist once, generate each episode from the same character file, and the program gains a personalized asset.

Brands and agencies: Multi-audience campaigns require characters with different images. Multiple sets of subjects can be built in parallel within the same session. Youth characters for the sports line and middle-aged characters for the family line do not interfere with each other, while output quality remains consistent. iQIYI’s platform-side experience in the film and television industry helps here: different audiences are sensitive to different aspects of image, and a structured design workflow makes those differences controllable.

Corporate training and course teams: Hundreds of lessons need a stable on-camera instructor. Instead of repeatedly scheduling a real person, it is better to turn the instructor’s image into a character asset, with every module generated from the same design.

Three Practical Tips for Character Design

• Create variants before finalizing: When the protagonist’s final look is not settled, first generate several three-view versions with different body types, ages, and outfits. Choose the one that best fits the story before moving into storyboarding. This is far easier than overturning everything halfway through.

• Write details specifically: In the design description, “wearing an old leather jacket” is not as useful as “wearing a brown leather jacket with polished, worn cuffs.” The more specific it is, the more stable the reproduction.

• Lock costumes by story segment: If a character changes outfits in the story, create separate reference images for each outfit and call them by scene during Image Fusion to avoid visual discontinuity midway.

Frequently Asked Questions

Q: What level of character consistency counts as acceptable?

Use the “jump cut test” as the standard: cut together two non-adjacent shots in which the character appears, and the audience should not suspect they are two different people. The combination of three-view plus multi-reference input can usually reach this standard consistently.

Q: How many characters can be managed at the same time?

In a typical creative scenario, 3–5 main characters are enough to support the narrative of a short drama. NadouPro’s canvas supports parallel management of multiple nodes, and character reference images can be mounted and called at any time.

Q: Can characters be reused across projects?

Yes. A character file is essentially a set of reference images and design descriptions. After saving it, you can import it directly into the canvas of a new project, making it suitable for long-term operation of program-based content and brand IP characters.

Q: Does this workflow also apply to non-realistic characters?

Yes. Anime and illustration-style characters can also use three-views to build a file. When generating, simply choose an image model that matches the corresponding style; the workflow remains the same.

Q: What is the relationship between character design and the script?

The script comes first. The story in Script Space determines the character requirements. Subject design is the translation of the script into characters, and the order should not be reversed.

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