The biggest challenge in professional AI video is maintaining consistency across multiple shots. A character's face, clothing, and proportions need to stay the same whether you're cutting between a wide establishing shot and a close-up.

Why Consistency Is Hard

Each AI generation starts from random noise. Even with the same prompt, you'll get different results every time. For a single hero shot this is fine — for a narrative with 20+ cuts, it's a serious problem.

Techniques for Character Consistency

1. Reference-Anchored Generation

• Generate a detailed character reference sheet first (front, side, 3/4 views)
• Use image-to-video with the same reference for every shot
• Tools like Runway Gen-4 and Kling 2.0 support character reference uploads

2. Consistent Seed + Style Locking

• Some models allow fixing the random seed for reproducibility
• Combine with identical style descriptors across all prompts
• Use the same negative prompts to prevent drift

3. LoRA Fine-Tuning

• Train a lightweight LoRA model on your character's reference images
• Apply the LoRA during generation for every shot
• Services like Civitai and Replicate make LoRA training accessible

4. Post-Production Fixes

• Face-swap tools can paste a consistent face onto inconsistent generations
• Color grading unifies the look even when details vary
• Strategic editing (cutting on motion, avoiding direct comparison) hides differences

Scene Consistency

For environments, the same principles apply:

• Create a master environment reference image
• Use consistent lighting descriptors: "golden hour, warm directional light from camera-left"
• Maintain the same camera height and lens description across shots
• Generate establishing shots first, then derive close-ups from those frames

Practical Workflow

1. Write a full shot list before generating anything
2. Create reference sheets for characters and environments
3. Generate the widest/most complex shot first as your anchor
4. Derive subsequent shots from the anchor, narrowing scope each time
5. Review all clips side-by-side before committing to edits