Motion Blur
Add perceptual blur as objects move quickly, mimic film

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Create an animation:
Animate an object to move quickly across the screen.

Arnold:
This will blur the object and shadow.
Open Windows->Rendering Editors->Render Settings...  srender_settings
Select Render Using Arnold Renderer
     Under the Arnold Renderer tab:
          Under the arrow Motion Blur
               Select Enable

Render a frame from the middle of the animation.
               Adjust Length


Maya Software:
This does not blur the shadow.
Open Windows->Rendering Editors->Render Settings...  srender_settings
Select Render Using Maya Software
     Under the Maya Software tab:
          Under the arrow Motion Blur
               Check Motion Blur
                         Select 3D

Render a frame from the middle of the animation to see the blur.

If you do not see enough blur, increase blur by frame

Try 2D motion blur if you like, it is a little strange



Mental Ray:
This will blur the object and shadow.
Open Windows->Rendering Editors->Render Settings...  srender_settings
Select Render Using mental ray
     Under the Scene tab:
          Under the arrow shutter
               Select Motion Blur Full

Render a frame from the middle of the animation.

If you do not see enough blur, increase Motion Blur By