MESHROOM | BLENDER | PHOTOSHOP
Pietro Chiovaro introduces the basic process for producing 3D models with the increasingly popular workflow
From VFX to video games, developers and artists are always looking for ways to achieve virtual realism, and one of the most-used methods nowadays is that of creating 3D-scanned models. The process behind this is called photogrammetry, and it’s a powerful and versatile technique that has revolutionised the capture and reconstruction of the real world into the virtual one.
Photogrammetry uses the principles of optics, geometry and computer science to transform two-dimensional photos into accurate and realistic 3D models. By taking multiple overlapping pictures of a subject from various angles, photogrammetry software develops and analyses the visual data to triangulate points within space, constructing detailed and life-like representations of landscapes, objects, or potentially even entire environments.
The discipline finds applications in diverse fields, from architecture and cartography to archaeology, virtual reality, and entertainment including movies, TV shows and video games. In this tutorial, I’ll guide you step-by-step in the production of your first 3D-scanned model, from taking photos through to polishing and rendering your scene with 3D software.
The process is always a journey and getting better will only happen with time, patience, and most importantly trying and failing, and learning from your mistakes. Now let’s get started!
01 UNDERSTAND THE BASICS
Photogrammetry is a process that uses overlapping photos to reconstruct either 3D models or scenes. It relies on the principle of triangulation, where software such as Capturing Reality or Metashape identifies common points across multiple images and calculates their 3D locations. These points, known collectively as a point cloud, are then used to generate the 3D model of the object. Understanding the fundamentals of this technique are essential to start working on photogrammetry scans with the confidence to finalise the process.
02 PICK YOUR CAMERA
The first step is to choose a camera that lets you capture high-quality images suitable for photogrammetry, as the level of the final scan depends on the quality of the images taken. Look for a camera with a high-resolution sensor to capture fine details, and a good lens that can help you work even in low light. For the same reason, it’s preferable for you to use a full-frame camera
