3D modeling is the process of developing a mathematical coordinate-based representation of a surface of an object (inanimate or living) in three dimensions via specialized software by manipulating edges, vertices, and polygons in a simulated 3D space. Three-dimensional (3D) models represent a physical body using a collection of points in 3D space, connected by various geometric entities such as triangles, lines, curved surfaces, etc. Being a collection of data (points and other information), 3D models can be created manually, algorithmically (procedural modeling), or by scanning. Their surfaces may be further defined with texture mapping.
3D Image Production
3D modeling creates digital representations of objects in three dimensions using specialized software. Texturing and mapping applies detailed surface textures to 3D models to enhance realism. Rendering converts 3D models into 2D images or animations with realistic lighting and shadows. Stereoscopy for still images creates images with depth perception, viewable with special glasses or techniques. Photogrammetry uses photographs to create 3D models of real-world objects or scenes. 3D scanning captures the physical shape and appearance of real objects and converts them into digital 3D models.
- Applications: Advertising, architectural visualization, and entertainment.
3D Video Production
Stereoscopic 3D involves capturing or rendering scenes from slightly different perspectives for the left and right eyes. When viewed through special glasses, these two perspectives create the illusion of depth, making objects in the video appear to emerge from the screen.
- Virtual Reality (VR): VR immerses the viewer in a completely digital environment. VR content production involves creating a 3D world that users can explore and interact with using VR headsets.
- Augmented Reality (AR): AR overlays digital elements onto the real world, enhancing the viewer's perception of reality by adding interactive and dynamic 3D objects to their surroundings.
3D Audio Production
Spatial audio adds depth and directionality to sound, replicating how sound is heard in a real-world environment. Binaural audio uses two microphones (or a microphone array) to mimic how human ears perceive sound, creating a 3D audio experience where sounds come from specific directions around the listener.
- Ambisonics: Ambisonics captures sound information from all directions in a spherical format, allowing for flexible manipulation of sound sources in a 3D space during playback. This technique is commonly used in VR and AR applications to create a realistic audio environment that changes based on the viewer's orientation.
