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