AI Video School – Official Site

Category: Tutorials

  • How to Create Consistent AI Voices with Text Prompts (No Tools Required)

    Creating consistent voices for your characters helps keep your audience engaged in the story of your AI movie. While the best results often require using multiple tools and additional editing, sometimes you want a method that’s “close enough” and can be done while generating your videos. To be clear, this method does not result in perfect results every time, but it should help you get more consistent voices simply by adding a few things to your prompt.

    To create consistent character voices across multiple shots in AI video, use this format:

    He/She says in the voice of a [AGE] [GENDER], [TIMBRE], [TONE], [PACING]: dialogue

    Examples of AI voice prompts:

    She says in the voice of a middle-aged woman, warm and measured, gentle tone, deliberate pacing: “Thanks for meeting me here.”

    He says in the voice of a weathered middle-aged man, deep and gravelly, matter-of-fact tone, slow pacing: “I knew something was wrong.”

    She says in the voice of a young woman, sharp and clear, dropping to urgent whisper, faster pacing: “No one can know about this.”

    Use My Free Prompt Template!

    Cut and paste the Five Essential Elements for AI Voice Prompts listed below into your favorite AI assistant (ChatGPT, Gemini, Claude, Grok, etc). Then describe the voice or upload an image of the character and ask for a voice prompt. Iterate and refine the prompt. Have fun making your AI film!

    The Five Essential Elements for AI Voice Prompts:

    1. AGE – Approximate age range
      • Examples: young, middle-aged, elderly, teenage, mature
    2. GENDER – Voice register
      • Examples: man, woman, boy, girl
    3. TIMBRE – The physical quality of the voice
      • Examples: deep gentle voice, warm measured voice, sharp clear voice, bright voice, gravelly voice, smooth voice
    4. TONE – The emotional quality or attitude
      • Examples: gentle tone, clinical tone, matter-of-fact tone, urgent whisper, concerned tone, confident tone
    5. PACING – How fast or slow they speak
      • Examples: slow thoughtful pacing, deliberate pacing, moderate pacing, faster pacing, measured pacing

    Pro Tips:

    • Keep AGE, GENDER, and TIMBRE the same across all shots for each character (this is their “voice signature”)
    • Vary TONE and PACING based on emotion (angry = faster, sad = slower, etc.)
    • Be specific – “middle-aged woman, warm and measured” is better than just “woman, nice”
    • Use 2-4 descriptors total after age/gender – more can confuse the AI

    Quick Reference:

    Character signature: [age] [gender], [timbre]
    Current emotion: [tone], [pacing]
    Complete tag: in the voice of a [age] [gender], [timbre], [tone], [pacing]

  • How to Create Consistent Characters with Reference Sheets

    Creating consistent characters is essential for AI filmmaking. Sometimes it’s easy to generate images of a consistent character, but when those images are turned into video, the character starts to look different when they turn or move. What we need to show our AI model is what our character looks like from every angle we plan to show them in.

    I use a technique that allows you to take a single photo of your subject, turn it into a reference sheet, and then use that as an element for generating videos or images with consistent characters. Plus, we can change their wardrobe for different scenes too.

    Reference image

    This is the reference I first tried this with. I wanted a space mechanic with some tattoos and other identifying features. The image itself is dimly lit and it’s not a full body shot. I chose it for those reasons on purpose, for testing purposes.

    Once you have your reference image, generate the character sheet using the prompt at the end of this post. I’m going to use Nano Banana in Google Flow. This should also work if you’re using Nano Banana in an all-in-one tool like Higgsfield, OpenArt, Leonardo, or Freekpik.

    Notice how the tattoo on her neck is the same. In the video, her neck tattoo remains consistent even when she turns around or is off camera then faces camera again.

    Once you have this reference sheet, use it as an element or ingredient in your video generator. This means the generator has to support “references” “ingredients” or “elements,” which are different names for the same thing.

    You can also change the character’s wardrobe with a simple prompt, also at the end of this post.

    Free Consistent Character Prompts

    Here are some prompt templates that I found work well in Nano Banana Pro.

    Consistent Character Prompt with a Reference Image

    Prompt to create a character reference sheet Create a professional character reference sheet based strictly on the uploaded reference image. Use a clean, neutral plain background and present the sheet as a technical model turnaround while matching the exact visual style of the reference (same realism level, rendering approach, texture, color treatment, and overall aesthetic). Arrange the composition into two horizontal rows. Top row: four full-body standing views placed side-by-side in this order: front view, left profile view (facing left), right profile view (facing right), back view. Bottom row: three highly detailed close-up portraits aligned beneath the full-body row in this order: front portrait, left profile portrait (facing left), right profile portrait (facing right). Maintain perfect identity consistency across every panel. Keep the subject in a relaxed A-pose and with consistent scale and alignment between views, accurate anatomy, and clear silhouette; ensure even spacing and clean panel separation, with uniform framing and consistent head height across the full-body lineup and consistent facial scale across the portraits. Lighting should be consistent across all panels (same direction, intensity, and softness), with natural, controlled shadows that preserve detail without dramatic mood shifts. Output a crisp, print-ready reference sheet look, sharp details.

    Consistent Character Prompt with No Reference Image

    Create a professional character reference sheet of [PUT YOUR CHARACTER DESCRIPTION HERE]. Use a clean, neutral plain background and present the sheet as a technical model turnaround in a photographic style. Arrange the composition into two horizontal rows. Top row: four full-body standing views placed side-by-side in this order: front view, left profile view (facing left), right profile view (facing right), back view. Bottom row: three highly detailed close-up portraits aligned beneath the full-body row in this order: front portrait, left profile portrait (facing left), right profile portrait (facing right). Maintain perfect identity consistency across every panel. Keep the subject in a relaxed A-pose and with consistent scale and alignment between views, accurate anatomy, and clear silhouette; ensure even spacing and clean panel separation, with uniform framing and consistent head height across the full-body lineup and consistent facial scale across the portraits. Lighting should be consistent across all panels (same direction, intensity, and softness), with natural, controlled shadows that preserve detail without dramatic mood shifts. Output a crisp, print-ready reference sheet look, sharp details.

    Changing the Wardrobe in Character Sheet in Nano Banana

    Keep the same character sheet layout. Keep their physical characteristics and expression the same. Change the outfit to [outfit description or reference to image].

    Enjoy making your characters more consistent!

  • Free AI Filmmaking Course: Kling, Veo, Nano Banana

    Making a cinematic movie is more than just typing a prompt and letting AI do all the work. It involves combining multiple steps into a cohesive workflow. This free AI mini-course shows you how to create a cinematic short film using Kling and Veo.

    First, let’s watch the movie you’ll learn how to make “Discarded Companion,” created using Kling 01, Veo 3.1, and ElevenLabs.

    Learn the tools: Kling O1, Nano Banana, Google Flow

    Before making “Discarded Companion,” I started comparing Kling O1 to Google Flow. Kling O1 is an all-in-one approach to using elements to create images and video. Google Flow combines Veo and Nano Banana (image generation and editing) into one easy to use tool.

    In this discovery process, I realized the capabilities of the tools opened up the possibilities for even more realistic and engaging storytelling. If you don’t know how to use Kling or Google Flow, this should set you off on the right path to knowing the essentials.

    My in-depth AI video workflow for Discarded Companion

    After making “Discarded Companion,” I showed how I generated every character and scene in the movie. This includes how to edit clips together for longer sequences. The video contains chapters so you can find the section you’re most interested in learning about.

    Start using the AI filmmaking tools you need now!

    Kling AI
    Google Flow
    CapCut Video Editing

    Some links on this site are affiliate links. If you purchase through them, I may earn a small commission at no extra cost to you. This helps support AI Video School and allows me to keep creating free tutorials. I only recommend tools I actually use in my filmmaking workflows.