Turn a topic or a script into a narrated video where every scene is a soft-lit 3D animated frame, with the same characters from start to finish.



AI images · Natural pace · Music · Transitions · Can be animated
Opens ShortFast with the 3D Animation style selected. Create an account to generate.
Create a 3d animation videoThis style draws every scene as a still from a big-studio animated film: rounded characters with large expressive eyes, soft global lighting, clean saturated color and a shallow depth of field that keeps attention on one subject. It reads as warm, friendly and a little premium, which is why it shows up so often in kids content, fun-fact shorts and small character stories.
ShortFast takes a topic like "5 fun facts about octopuses" or a script you paste, writes or keeps the narration, splits it into scenes and draws each one in this 3D look. The same palette and recurring characters carry through the whole video, so the little robot in scene one is still the same robot in scene twelve. Captions, a narration voice and music are added, then you download it or let it post.
Start from an idea such as "A little robot learns what friendship means", or paste a script you already wrote and ShortFast keeps your words.
Every scene gets its own picture, and a shared palette, setting and recurring characters keep each image in the 3D Animation look from the first scene to the last.
Pick one of 21 narration voices. Captions are burned in, and the 3D Animation defaults (natural pace, background music, transitions) are already set. You can change any of them.
Download the video, auto-post it to TikTok, YouTube Shorts and Instagram Reels, or turn the theme into an automated series that makes a new episode on a schedule.
The 3D animated look borrows a visual grammar most viewers learned as children: oversized heads and eyes, faces that show one clear emotion at a time, and lighting that separates the subject from the background. That clarity matters on a phone screen. Someone scrolling past can read who the scene is about and how they feel in well under a second, before the narration has said anything.
It also makes abstract ideas concrete. A brain deciding what to eat becomes a tiny control room with a character pulling levers, and a fact about octopus hearts becomes an octopus holding up three glowing hearts. Turning the subject into a character is what this style does best, and it lets a thirty-second explainer feel like a small story instead of a list.
The softness is part of the appeal. Nothing looks harsh or threatening, which keeps the tone friendly even when the topic is a little serious and makes the videos comfortable to watch with a family audience. For adult viewers, the same softness makes a lesson feel like light entertainment rather than a lecture.
It fits anything with a character at the center or a subject that benefits from being made cute: kids learning channels, animal facts, simple science for younger viewers, bedtime-style stories, and recurring character series like "A little robot's adventures, one episode per video." It also works for light explainers aimed at adults, such as how habits form, where a friendly character softens the lesson.
It is a poor fit for true crime, serious news, or money advice that needs to look credible. A cheerful animated character narrating a tragedy reads as tone-deaf. For those topics a cinematic, documentary or dark mystery style will serve the script better, and you can pick a different style before generating.
Keep it for invented characters, animals and objects. Real public figures drawn in this look tend to come across as caricatures. And if the videos are aimed at children, set the made-for-kids designation where the platform asks for it, since that changes how comments and ads work on those videos.
Give the video one main character and introduce it early, even if it is just "a little robot" or "an octopus named Pip." The scene planner uses that to keep the character consistent across images, and viewers follow a character more readily than a topic. Open on the character in a situation, not on the lesson: "This robot has never had a friend" beats "Today we learn about friendship."
The style starts on a normal pace, with music and transitions on. Normal pace means a new image when the idea moves on, around every five seconds, which gives each frame time to be read without dragging. Music and soft transitions suit the storybook feel. For a quick list of facts, switch to fast pace so each fact gets its own frame; for a bedtime story, slow pace lets each scene breathe.
Under one minute, that works out to roughly eight to twelve scenes with one idea each. If you want motion rather than stills, the Animate images option turns each scene's image into a short clip in the same 3D look. It costs more credits, billed per second of video, and is available for videos up to two minutes.
Give ShortFast one theme and it makes a new 3d animation video on a schedule, every day, twice a day or a few times a week. Each episode covers a new topic on the theme, and the video is emailed to you or posted to your accounts. Themes that work well in this style:
A playbook for running a faceless facts channel: formats that add editorial value, ready-to-use hooks, a full sample script, what to put on screen, and an honest look at RPM and YouTube's inauthentic-content rules.
Open NicheA playbook for a faceless kids learning channel: alphabet, numbers and animal explainers built on real footage, with formats, hooks, a sample script and a practical guide to made-for-kids rules and their effect on revenue.
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ShortFast writes the script, draws every scene in this style, adds the voice and captions, and can post it for you every day.