##
Linear Blur

This effect acts only in one direction which can vary up to an angle of 180 with these parameters:

Figure 10.54: For clarity of presentation only 2 fields are shown

Length:
  distance between original image and final blur step; corresponds to the distance of the fields.
Angle:
  angle of motion in one direction for linear blur
Steps:
  number of blur steps to be used in the calculation. Increasing the number takes more CPU.
Channels:
  R,G,B,A.
Clear
  With the Clear buttons we can bring the slider to default values without affecting the other parameters.

For maximum precision you can use the input box. Figure 10.54 shown here has the parameters: Length = 19, Angle = 25, and Steps = 2.