Reference > Dialogs > Directional Blur

Directional Blur Dialog Box


The Directional Blur effect creates a motion blur that pulls and smears the image from one contour edge to a different direction or angle. This effect is useful in creating the impression of speed, such as the streaks of colour that follow a car travelling at high speed. The look of the blur is similar to the look achieved using Gaussian blur when applied with multiple iterations.

Parameter Description
Length Length of the blur.
Width Thickness of the blur.
Angle The direction in which the blur is applied: sideways, up, down, 90 degrees, 45 degrees, and so on.
Bidirectional Applies the blur on both sides of the pixel.
Fall Off The distance where the blur fades from the edge of the image. Select a value between 0 and 1. A fall-off rate of 0 causes the blur to fade out slowly, distributing the blur evenly from the edge of the character to the farthest edge of the blur. A fall-off rate of 1 causes the blur to fade out quickly, so the blur is heaviest closer to the edge of the image.
Number of Iterations The number of times the blur is applied to the image. A higher number of iterations creates smoother transitions between colours and increases the blur, but also increases render time.