How to Use Universes for Consistent AI Videos in LongStories

How to Use Custom Universes for Consistent AI Videos in LongStories


Slug: /longstories/use-custom-universes-consistent-videos


Who this is for


Creators who want every video in a series or brand to share the same visual style, world rules, and aesthetic — without manually re-prompting the look each time.


Overview


A universe in LongStories is a style container. Every video you generate inside it inherits the same visual language: consistent lighting, color palette, tone, and world logic. Without a universe, each video risks looking like it came from a different project entirely.


This guide walks through how to select a custom universe and generate a video inside it.


Step-by-Step Workflow


1. Start a New Video


  1. Log in to LongStories.
  2. Click Create new video from the main interface.


2. Change the Universe


  1. On the new video screen, click Change universe.
  2. Browse the list of available universes:
  • System universes (built-in defaults)
  • Your custom universes (e.g., a Lego City universe you built earlier)
  1. Use the search bar if you have many universes saved.
  2. Select the universe that fits your project.


3. Write Your Prompt Inside the Universe


With the universe selected, write your scene or story in the prompt box. Be descriptive but focused:


Example prompt:

"A clumsy rooftop superhero faces a giant Lego robot attacking the city. Heroes work together to calm the robot using playful city builds."


Because the prompt is tied to the Lego universe, every generated shot inherits that Lego visual style automatically — you don't need to describe the style in the prompt itself.


4. Adjust Video and Animation Settings


Before generating, tune the output settings to match your needs:


Setting

What it does

Animation mode

Switch between Pro (higher quality) and Fast (quicker render)

Multi-cut

Toggle off for fewer cuts or simpler scene flow

Watermark

Remove for a clean final render


Adjust based on whether this is a draft pass or a final deliverable.


5. Generate the Video


  1. Once your universe and settings are set, click Generate video.
  2. Rendering takes time — this is normal for high-quality output.
  3. The final video will be composed of shots that all share the same visual style defined by your universe.


When to Always Use a Universe


Use a custom universe whenever:


  • You're building a series — episodes need the same look and feel.
  • You need brand consistency — every marketing video should match.
  • You're developing an identifiable IP world — noir city, anime school, Lego city, etc.


Without a universe, prompts produce varied, disconnected results. With one, your output becomes a cohesive body of work.


Example Use Case


You're running a YouTube channel built around a Lego-style animated world. You create a Lego universe once. Every video — action sequences, character intros, lore drops — gets generated inside that same universe. Your channel develops a recognizable identity without you manually re-specifying the art style every time.


Pro Tips for Filmmakers


  • Name your universes clearly — you'll accumulate them fast. Use names like "Lego City – Bright", "Neo-Noir Alley – Dark", "Corporate Explainer – Clean".
  • Your prompt handles story; your universe handles style. Keep that separation clean for best results.
  • Run a quick test generation in a new universe before committing it to a full series — a short 15-second clip reveals a lot about whether the style is locked in.


Watch Tutorial on Youtube


How to Use Custom Universes for Consistent AI Videos in LongStories

Updated on: 03/03/2026

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