Hardware, Lighting & Setup

3D computer graphics are different from 2D computer graphics in that a three-dimensional representation of geometric data is stored in the computer for the purposes of performing calculations and rendering 2D images. Such images may be for later display or for real-time viewing. more...

Home
Bags, Cases & Straps
Binoculars & Telescopes
Camcorder Accessories
Camcorders
Digital Camera Accessories
Digital Cameras
Film
Film Camera Accessories
Film Cameras
Film Processing & Darkroom
Chemistry
Enlargement Equip. &...
Finishing Equipment
Hardware, Lighting & Setup
Bulbs & Lights
Clocks & Timers
Other Hardware
Loupes & Magnifiers
Other Darkroom Equipment
Photographic Paper
Processing Equipment
Flashes & Accessories
Lenses & Filters
Lighting & Studio Equipment
Manuals, Guides & Books
Photo Albums & Archive Items
Printers, Scanners &...
Professional Video Equipment
Projection Equipment
Stock Photography & Footage
Tripods, Monopods
Vintage
Wholesale Lots

Despite these differences, 3D computer graphics rely on many of the same algorithms as 2D computer vector graphics in the wire frame model and 2D computer raster graphics in the final rendered display. In computer graphics software, the distinction between 2D and 3D is occasionally blurred; 2D applications may use 3D techniques to achieve effects such as lighting, and primarily 3D may use 2D rendering techniques.

3D computer graphics are often referred to as 3D models. Apart from the rendered graphic, the model is contained within the graphical data file. However, there are differences. A 3D model is the mathematical representation of any three-dimensional object (either inanimate or living). A model is not technically a graphic, until it's visually displayed. Due to 3D printing, 3D models are not confined to virtual space. A model can be displayed visually as a two-dimensional image through a process called 3D rendering, or used in non-graphical computer simulations and calculations.

Overview

The process of creating 3D computer graphics can be sequentially divided into three basic phases: 3D modeling which describes the shape of an object, Layout and Animation which describes the motion and placement of objects within a scene, and 3D rendering which produces an image of an object.

Modeling

The model describes the shape of an object. The two most common sources of 3D models are those originated on the computer by an artist or engineer using some kind of 3D modeling tool, and those scanned into a computer from real-world objects. Models can also be produced procedurally or via physical simulation.

Layout and Animation

Before object may be rendered, it must be placed within a scene. This is what defines the spacial relationships between objects in a scene including location and size. Animation refers to the temporal description of an object, i.e., how it moves and deforms over time. Popular methods include keyframing, inverse kinematics, and motion capture, though many of these techniques are used in conjunction with each-other. As with modeling, physical simulation is another way of specifying motion.

Rendering

Rendering converts a model into an image either by simulating light transport to get photorealistic images, or by applying some kind of style as in non-photorealistic rendering. The two basic operations in realistic rendering are transport (how much light gets from one place to another) and scattering (how surfaces interact with light). This step is usually performed using 3D computer graphics software or a 3D Graphics API. The process of altering the scene into a suitable form for rendering also involves 3D projection which allows a three-dimensional image to be viewed in two dimensions.

Read more at Wikipedia.org