This is done through perspective and shading. In prospective, parallel lines dealing away from the viewer eventually intersect at the horizon, so the portion of an object that is farther away from the viewer appears to be narrower than the portion that is closer. The basic rule of shading is that colors get darker as the distance from the light source grows. The angle at which light falls on a surface determines how quickly the brightness fades, and the type of surface further changes the effect of reflected light. As shown in Figure 2-5.
Bitmaps contain the information for each pixel, so they have large file size.
Bitmaps are difficult to edit or resize without distorting them. Wave audio files are recorded sounds converted into a digital format to play on a computer. MIDI audio is the musical instrument digital interface for the digital representation and transmission of music that is now adhered to worldwide by virtually all makers of electronic music equipment. CD-audio is digital sound stored on a compact disc. It cannot be used directly, but by link to a particular track on the CD through CD-ROM driver.