To implement Augmented Faces, you need customized textures and models for overlaying on identified face meshes. These assets are created by artists ahead of time in 3D modeling and animation software, and exported as FBX files.
The SDKs ship with a
canonical_face_mesh.fbx file and a
canonical_face_mesh.psd file to help artists create assets that will overlay
properly onto faces detected by ARCore. These files can be found in the
following locations for each SDK:
|ARCore SDK for Android||
|ARCore SDK for iOS||
For iOS, note that both the FBX and PSD files are included in the public iOS GitHub repo, but are not shipped as part of the ARCore Cocoapod.
|ARCore Extensions for AR Foundation||
|ARCore SDK for Unity||
Create 3D models with the FBX file
The FBX file contains the face mesh topology, UV texture coordinates, and rig that defines the supported facial regions provided for creating and attaching assets. To ensure they're compatible with ARCore, FBX files should be saved using supported settings.
This file contains a reference
facemesh that should not be exported as part of
the final FBX. ARCore will generate and update a separate face mesh at
Create 2D textures with the PSD file
.psd face mesh reference texture is used to see how a texture that an
artist creates lines up with a user's facial features at runtime. It includes
- Mask: Shows where the eyes, nostrils, and mouth are located in the texture.
- Lines: Guidelines that show how a user's facial features line up with a texture during runtime.
- UVs: Represents triangulation of the 468 point face texture mesh.
- Background: A neutral gray background layer to make the other three components visually clear.
If you modify the PSD file, you should see your changes as soon as you export.
Customize the canonical face mesh
If models and textures are being created using the
assets/canonical_face_mesh.fbx included in the SDK, these settings are also
required when exporting FBX files:
Make sure the any custom meshes are skinned to the associated bones or regions.
Use the following hierarchy:
asset |__root | |__NOSE_TIP | |__FOREHEAD_RIGHT | |__FOREHEAD_LEFT |__facemesh <-- for reference |__ <-- place additional custom 3D meshes here
Do not export the included
facemeshmodel. This mesh is for reference only. ARCore will create a separate face mesh at runtime. Use the UVs in
facemeshas a reference when creating custom face mesh textures.
Place custom meshes as children of the
Use of namespaces is supported.
The asset contains four bones consisting of
FOREHEAD_LEFTregions. Do not change the names of these bones.