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Motion Blur

Motion-blur literally means "motion-track". It is the visual tail trace that fades to the starting point direction of the movement (indicating the opposite direction of the movement) in graphical operations.

3dfx firm(en) has offered this feature to users in Voodoo 5(en) and Voodoo 6 series. Although Nvidia and ATI graphics cards have this feature, unfortunately, this effect is active only according to the understanding of the programmers of the games.

It is a special method used to cover graphic errors in games. In Sony PlayStation 2 game console, this feature is given with hardware support.

It is a nearly hundred-year-old technique used in the movie industry in order not to lose the flow of the image in 24 fps scenes and fast motion scenes.

Motion Blur

There are three principally different methods of Motion Blur and each methods have different advantages and disadvantages;

  • Raytraced 3d motion blur
  • Fast rasterizer ("rapid scanline") 3d motion blur
  • Post processing 2d motion blur

Raytraced 3d motion blur

This is the most advanced type of motion blur. For every spatial sample within a pixel, a number of temporal rays are sent.

Fast Rasterizer (aka "Rapid Scanline") Motion Blur

The rasterizer is the new "scanline" renderer introduced in mental ray 3.4, and it performs a very advanced subpixel tessellation which decouples 'shading' and 'surface sampling'.

Post Processing 2d Motion Blur

It works by using pixel motion vectors stored by the rendering phase and "smearing" these into a visual simulation of motion blur. It 's known as post process.

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