Stage Guide > Toon Boom Harmony 10 Stage User Guide > Chapter 19: Effects > Using Effects > Blur Directional


The Blur-Directional effect creates the effect of 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.

Use the Blur-Directional editor to control the settings of the Blur-Directional effect.

Truck Factor: Activated by default, this option readjusts the blur when the elements undergo a change of depth or scale. When this option is disabled, the effect's values will remain unchanged regardless of any depth or scale changes. We recommended that this option be disabled when multiple drawings are composited and attached to this effect. You can attach these values to function curves to change them over time.
Radius: Enter a value for the size of the blur. The larger the value, the greater the blur effect. The blur radius is affected by the drawing scale and camera position.
Fall-off Rate: 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 that the blur is heaviest closer to the edge of the image.
Angle: The direction of the blur. Enter a value from 0 to 360.
0: blurs the image to the west.
90: blurs the image to the south.
180: blurs the image to the east.
270: blurs the image to the north.
Direction of trail: If you do not set an Angle for the direction of the blur, you can select a direction (north, south, east, or west) from this menu. The calculations for this feature are faster than the calculations for the Angle setting.
Ignore Alpha: This option controls the leading edge of the blur. Deselect this option for a solid or hard leading edge on the blur.
Extra Final Blur: This option causes the software to apply a second blur after the Blur-Directional is created. If you have aBlur-Directional that begins at 0 and gradually gets stronger, disable this option to ensure a smooth progression.

Related Topics 

Using Effects