AI Video Tutorial & Prompt Guide
How to Replace Full Characters in Any Video Using Higgsfield AI (Genjutsu Motion Transfer)
Have you ever wanted to replace an actor or dancer in a video with your own custom AI character, but simple face-swap tools left the original clothes, hair, and body unchanged?
With Higgsfield AI's Genjutsu (Motion Transfer) model, you can now perform a complete character transformation. It replaces the entire character—face, hairstyle, body build, clothing, and accessories—while preserving 100% of the original choreography, camera motion, lip-sync, and realistic lighting.
Unlike traditional deepfakes that only paste a 2D face, Genjutsu recalculates realistic scene physics, fabric folds, dynamic lighting, and body proportions onto your target character reference.
Face Swap vs. Full Character Replacement
| Feature | Traditional Face Swap | Higgsfield Genjutsu |
|---|---|---|
| Facial Identity | Swapped | ✅ Fully matched with emotion & lip sync |
| Hairstyle & Color | ❌ Retains original actor hair | ✅ Replaced with target character's hair |
| Clothing & Outfit | ❌ Original clothes only | ✅ Complete outfit & texture transfer |
| Physique & Anatomy | ❌ Original actor body | ✅ Transformed to match character ref |
| Lighting & Shadows | Often looks pasted | ✅ Dynamically calculated scene physics |
Step-by-Step: How to Create Your Motion Transfer Video
Select the Genjutsu Model
Log in to Higgsfield.ai and select the Genjutsu - Motion Transfer model from the creation dashboard.
Upload Your Assets
• Source Video: Upload the clip with the action, acting, or choreography you want to mimic.
• Target Image: Upload your character reference image and ensure it is tagged as @Image 1.
Configure Resolution & Bitrate
Set your desired aspect ratio (16:9 for YouTube, 9:16 for Reels/TikTok, or 1:1 for feed posts) and choose High Bitrate for razor-sharp textures.
Paste the Master Prompt & Generate
Paste the exact prompt template provided below and click Generate.
📋 The Exact Master Prompt (Copy & Paste)
Copy this ready-to-use prompt and paste it directly into Higgsfield:
Replace the entire main male character in the source video with the exact character shown in @Image 1. @Image 1 is the complete and authoritative reference for the new character’s identity and appearance. Match @Image 1 exactly, including the face, facial proportions, eyes, nose, lips, jawline, skin tone, hairstyle, hair color, body shape, physique, clothing, outfit design, colors, patterns, shoes, accessories, and overall styling. The character’s complete look must remain exactly like @Image 1 throughout the entire video. Do not alter, redesign, simplify, beautify, modernize, recolor, or reinterpret the character’s appearance. Do not use the original character’s face, hairstyle, body, clothes, suit, colors, accessories, or visual styling. If @Image 1 contains multiple views of the same person, use all views to maintain the same consistent character from every angle. Treat all views as references for one single person, not different people. Preserve the exact identity and appearance during front views, side views, three-quarter views, head turns, speech, fast movements, and changing camera angles. Keep the character’s face, hairstyle, outfit, body proportions, and accessories consistent from the beginning to the end of the video. The character must always look like the person shown in @Image 1, with no identity drift or changes in costume, hairstyle, facial structure, or body design. Preserve the original video’s actions, choreography, gestures, poses, body movements, head movements, gaze direction, facial expressions, lip-sync timing, camera movement, framing, editing, background, environment, other people, and audio. Apply the original character’s movements naturally to the new character while keeping the new character’s exact appearance from @Image 1. Match the original scene’s lighting, shadows, reflections, perspective, depth of field, color grading, and motion blur. Make the clothing, hair, face, and body interact naturally with movement and objects. Preserve realistic skin texture, fabric details, clothing folds, natural occlusions, and hands or objects passing in front of the character. The final result must look as if the exact character from @Image 1 was originally filmed in the source video. Do not create a face swap only. Replace the complete character design while keeping the character’s look exactly based on @Image 1. Avoid any face-only replacement, original-character clothing, original-character hairstyle, look changes, identity drift, flickering, facial warping, inconsistent outfit, changing colors, changing accessories, beauty filters, plastic skin, distorted anatomy, extra limbs, visible seams, or cartoon-like rendering.
💡 Pro Tips for Studio-Quality Results
🔄 Use Multi-View Character Sheets
If your actor turns around, upload a turnaround sheet (Front + 3/4 + Profile view) as @Image 1 to prevent identity glitching.
☀️ Match Base Poses & Lighting
Selecting a reference image with clean, neutral lighting lets the AI accurately cast the source scene's dynamic shadows.
🗣️ Precise Lip Synchronization
If the original actor is speaking or singing, Genjutsu matches mouth articulation down to individual syllables.
❓ Frequently Asked Questions (FAQ)
Q: Can I replace a female character or anime character?
Yes! Simply change "male character" to "female character" or your specific character type in the first line of the prompt.
Q: Why did my video only change the face?
Ensure you include the negative constraints from the prompt forbidding face-only replacement, and check that your image reference shows full clothing and hair clearly.