Graphics Programs Reference
In-Depth Information
The three properties are explained here:
• Motionblur is the quality of the motion blur applied. A higher number results in a
slower render, but produces a better result. A value of 1 is adequate.
• Shutter is how long the motion blur will be. The default 0.5 mimics normal real-
worldcamerasettings,andifyouarefamiliarwithreal-worldfilmcameras,equals
a camera shutter angle of 180 degrees.
• Shutter Offset defines how the blur behaves in relation to the current frame. The
blur can precede the motion, come after it, be centered around it (the default), or
follow any custom in-between.
The second motion blur method involves generating motion vectors. Nuke has the ability
to turn the movement values it is generating within the system into motion data and then
usethatdatatomotionblurtheimage. Motion vectors aredefinedascolorvaluesforeach
pixel in the image representing movement in X and Y. Here's how it's done.
1. Select Blur1 and connect a MotionBlur2D node to it from the Filter toolbox.
2. Connect MotionBlur2D1's second input, called “2D transf,” to CornerPin2D1
( FIGURE 5.33 ) .
Figure 5.33. Connecting the MotionBlur2D node.
 
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