High-resolution 3D capture of an actor's face for digital double creation – uses photogrammetry or structured light scanning to record facial geometry, skin texture, and pore-level detail essential for believable CG face replacement or de-aging work.
What is a Face Scan?
A Face Scan is the high-resolution 3D capture of an actor's face. The resulting data – geometry, texture, pore detail – forms the basis for digital doubles, de-aging, and CG face replacement.
Scan Methods
| Method | Description |
|---|---|
| Photogrammetry | Multi-camera rig |
| Structured Light | Projected patterns |
| Laser Scanning | Point-by-point |
| Light Stage | + Lighting data |
| Hybrid | Combination |
Photogrammetry Setup
| Element | Specification |
|---|---|
| Cameras | 50–200+ DSLRs |
| Synchronization | Simultaneous trigger |
| Lighting | Even, neutral |
| Resolution | 24–50 MP per camera |
Captured Data
| Data Type | Usage |
|---|---|
| Geometry | 3D mesh |
| Diffuse Texture | Skin color |
| Specular Map | Shininess |
| Displacement | Fine detail |
| Subsurface | Light transmission |
Scan Poses
| Pose | Purpose |
|---|---|
| Neutral | Base geometry |
| FACS Poses | Muscle movements |
| Expressions | Emotions |
| Phonemes | Lip sync |
| Range of Motion | Extreme positions |
FACS (Facial Action Coding System)
| Element | Description |
|---|---|
| Action Units | Individual muscles |
| Combinations | Complex expressions |
| Intensity | Gradations |
| Reference | For rig building |
Light Stage
| Aspect | Function |
|---|---|
| Structure | Sphere with LEDs |
| Capture | Reflectance data |
| Relighting | Post-lighting |
| HDRI | Simulate ambient light |
Scan Session Workflow
| Phase | Duration |
|---|---|
| Setup | 15–30 min |
| Neutral Scan | 5 min |
| Expression Scans | 30–60 min |
| FACS Poses | 60–90 min |
| Post-processing | Days–Weeks |
Data Processing
| Step | Description |
|---|---|
| Photo Alignment | Assign images |
| Point Cloud | Generate 3D points |
| Mesh | Create surface |
| Texture Projection | Apply color |
| Cleanup | Correct errors |
Resolution
| Level | Detail |
|---|---|
| Low | Basic shape |
| Medium | Skin wrinkles |
| High | Pores |
| Ultra | Sub-pores |
Applications
| Application | Example |
|---|---|
| Digital Double | Stunt replacement |
| De-Aging | Younger version |
| Face Replacement | Different performer |
| Posthumous | Deceased actors |
| CG Character | Stylized |
VFX Integration
| Phase | Description |
|---|---|
| Modeling | Optimize mesh |
| Rigging | Prepare for animation |
| Texturing | Create shaders |
| Lighting | Correct response |
| Compositing | Integration |
Legal Aspects
| Aspect | Consideration |
|---|---|
| Likeness Rights | Usage rights |
| Contract | Clear agreement |
| Usage | Defined application |
| Future Use | Subsequent productions |
Known Providers
| Provider | Specialization |
|---|---|
| ICT/USC | Light Stage pioneer |
| 3Lateral | Facial animation |
| Digital Domain | Full service |
| Weta Digital | Character work |
Best Practices
| Practice | Reason |
|---|---|
| Neutral Face | No tension |
| Marker-free | Clean skin |
| Relaxed | Natural position |
| Documentation | For matching |
Today
Face scanning is a fundamental technology for photorealistic CG characters. From superhero doubles to de-aging effects, the precise 3D capture of the human face enables effects that were impossible just a few years ago.
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