In computers, 3-D (three-dimensional) describes an image that provides the perception of depth in a two-dimensional space.
A 3-D image creation can be viewed as a three-phase process of tessellation, geometry, and rendering.
Image Editing software are graphic programs that provide a variety of special features for altering bit-mapped images or the creation of graphic images. Image editors also enable you to create and superimpose layers.
Bit-mapped graphics are often referred to as raster graphics. The other method for representing images is known as vector graphics or object-oriented graphics.