Tutorial: Using Photogrammetry to Create Digital Portraits

The Gnomon Workshop has released a new tutorial called Creating Digital Doubles With Single-Camera Photogrammetry, a compelling guide to photo-based 3D scanning of the human head, recorded by facial modeler Adam Spring. This 5.5-hour workshop uses a range of software, including photogrammetry app Agisoft Metashape, scan-editing tool Wrap, Lightroom, Mari, Photoshop, and ZBrush.

Photogrammetry has become an integral part of the 3D industry, particularly when it comes to creating digital characters for film, TV, and games. Adam Spring, an experienced senior 3D Artist and Facial Modeler, provides an in-depth introduction to photogrammetry, with a focus on using single-camera head scanning. The topics included in this workshop cover the principles of photography, capture kits, and shooting patterns for capturing a head scan; as well as use cases, examples, and the limitations involved.

Spring also sets out his own complete process for creating scan-based 3D models of real people, beginning by pre-processing source photos in Lightroom. He then uses Agisoft’s Metashape to generate a 3D head, before cleaning up the mesh in ZBrush, retopologizing it in R3DS’s Wrap, and removing unwanted texture details in Mari and Photoshop. The final part of the workshop explores how to optimize scan data for use in a look development pipeline.

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