Processing and Formatting Effects > Flame FX >

# Motion Blur

Use Motion Blur to simulate the blur created by fast-moving objects.

You can access the Motion Blur Effect in the following ways:

- As a Batch node. This node accepts front, matte and fwd vector clips and outputs a Result, OutMatte, or Forward Vector clip.
- From the EditDesk. Select Flame FX2 from the A/V Tools box and then click Motion Blur. Choose either Front/Fwd Vector or Front/Matte/Fwd Vector.

Motion Blur provides two independent algorithms: trails and samples. Trails provides a per-pixel motion blur, while samples does sample accumulation. Motion Blur works on the current frame only; it does not require past or future frames.

Vector Input Type Settings

Vector Input Type button
  Select whether the vector inputs are Absolute or Normalized.
Max Displace field
  This field displays the level of motion displacement in the image. Set it to the same value that was set in the 3D application.
Blue Channel Magnitude button
  Enable this button to use the blue channel as a magnitude multiplication of the maximum displacement value.
Black As No Movement button
  Enable this button to set black pixels as no movement in the motion vector. When it is enabled, you can set a threshold value for near-black pixels.
Threshold field
  Displays the level of near-black pixels taken into account in the conversion.

Blur Type Settings

Blur Type button
  Enable this button to select between trails and samples. Choose trails for a pixel-based motion blur. Choose a sample for an accumulation-based motion blur.
Amount field
  This field displays the amount of motion blur applied to the image.
Softness field
  This field displays the amount of softness applied to the trails. It is only available when the blur type is trails.
Samples field
  This field displays the amount of samples applied to the image. The higher the value, the more samples are used and the smoother the image will be. This field is only available when the blur type is samples.
Balance field
  This field displays the amount of blur that either precedes or follows the image. The more positive the number, the more blur precedes the image. The more negative the number, the more blur follows the image.

Artefacts Settings

Vector Softness field
  This field displays the amount of softness that is applied to reduce the quality of vectors, and therefore solve precision artefacts.
Post Blur field
  This field displays the amount of global blur applied after other effects have been applied. Use this field conservatively.
Matte Fill field
  This field displays the amount used to fill in gaps in the matte. This field is best applied after the softness has been adjusted. It is only available when the blur type is set to trails.

Colour Interpolation Settings

Colour Interpolation button
  Enable this button to verify that the source is already premultiplied, in which case the colour interpolation effect must treat the image differently for the effect to work properly. This button is only functional when there is an input matte.

Motion Opacity Curve

Motion Opacity Curve
  The Motion Opacity Curve allows you to control the opacity of the trail by shaping it using the curve.