Effects and Tools Reference > Blur >

# Blur Menu Settings

## General Settings

Rendering box
  Select whether to render in Progressive or Interlaced mode.

Regen button
  Enable to get dynamic updating of the image as you make changes.

## Setup Settings

Clamp Input button
  Enable to clamp colour and luminance values on input in the 16-bit floating point rendering pipeline.

Clamp Render box
  Select a clamping option for colour and luminance values on output in the 16-bit floating point rendering pipeline.

## Blur Type Settings

Blur Type for Gaussian | Blur Type for Radial

Blur Type box
  Select the type or shape of blur filter to apply to the clip. Depending on the blur type, some of the other blur settings may vary.

Bokeh Blur field
  Displays the amount of smoothness applied to sharp bokeh edges. This creates the blur that is applied to out-of-focus points of light to simulate a shallow focus. Editable.

Bias field
  Displays the direction of a blur. Enter a positive value for forward, a negative value for backward, or 0 for a blur that moves in both directions. Available when Directional or Radial Stamp is chosen as the blur type.

Radial Mode box
  Select whether a radial blur or glow moves in one circular direction (Spin), or two rotating directions (Twist). Available when Radial is chosen as the blur type.

Samples field
  Displays the quality of a Radial Stamp blur or glow. Editable. Available when Radial Stamp is chosen as the blur type.

## Color Space Settings

Colour Space box
  Select whether to blur in RGB or YUV space. The Channels settings change to reflect this setting.

## Centre Settings (Radial Only)

Stabilizer button
  Opens the Stabilizer menu to track the centre of the blur from the source clip. See Tracking for more information.

Centre X field
  Displays the X position of the centre of the radial blur (or gesturally move the red circle in the image). Editable.

Centre Y field
  Displays the Y position of the centre of the radial blur (or gesturally move the red circle in the image). Editable.

NoteYou can also move the red circle on the image to set the position of the centre of the blur. The Centre X and Y fields update accordingly.

Absolute/Relative box
  Select whether to position and offset the centre of the radial blur in a relative mode (expressed as a percentage) or absolute mode (expressed in pixels).

Offset X field
  Offsets the centre along the X axis (or press Ctrl and gesturally move the red circle in the image).This field is useful to apply changes to the centre after tracking has been performed. Editable.

Offset Y field
  Offsets the centre along the Y axis (or press Ctrl and gesturally move the red circle in the image). This field is useful to apply changes to the centre after tracking has been performed. Editable.

NoteYou can also press Ctrland move the red circle on the image to set the offset of the centre blur.

## Front Settings

Width field
  Displays the width of the blur.Increasing the blur increases the render time. Editable.

Height field
  Displays the height of the blur.Increasing the blur increases the render time. Editable.

Proportional button
  Enable to affect the width and height proportionally.

Pixel Ratio button
  Enable to blur the image using the same proportion as its aspect ratio.

Gain field
  Displays a value by which pixel colour values are multiplied. The offset value is added to this value to determine the final colour. Editable.

Offset field
  Displays the value to add to current pixel colour values. The resulting colour value is clipped at 0. Editable.

Length field (Directional)
  Displays the radius amount of a directional blur. Editable.

Angle field (Directional)
  Displays the angle of a directional blur. Editable.

Amount field (Radial, Radial Stamp)
  Displays the amount of radial blur. Editable.

Rotation field (Radial, Radial Stamp)
  Displays the angle of rotation for a radial blur. Editable.

## Blooming Settings (Defocus Only)

Basic/Additive Blooming button
  Switch between basic blooming and additive blooming bokeh effects. The basic blooming mode displays the gain applied to highlights in non-HDR images, to allow the creation of bokeh patterns without affecting colour integrity. The additive blooming mode allows you to create higher intensity bokeh patterns from any source image, using minimum and maximum thresholds for highlight segregation.

Basic Blooming field
  Displays the gain applied to highlights in non-HDR images, to allow the creation of bokeh patterns without affecting colour integrity. This creates the glow effect that is applied to the bright spots of the image to simulate light bleeding, or blooming, over the edges. Editable.

Additive Blooming field
  Displays the amount of high intensity bokeh patterns that can be created from any source image generating extreme highlight content . Editable.

Additive Blooming minimum field
  Displays the minimum threshold for highlight segregation. Editable.

Additive Blooming maximum field
  Displays the maximum threshold for highlight segregation. Editable.

## Matte Settings

Matte Settings for Gaussian, Defocus, or Box | Matte Settings for Radial or Radial Stamp | Matte Settings for Directional

Matte Width field
  Displays the width of the blur for the matte. Editable.

Matte Height field
  Displays the height of the blur for the matte. Editable.

Matte Length field
  Displays the radius amount of a directional blur for the matte. Editable.

Matte Angle field
  Displays the angle of a direction blur of the matte. Editable.

Matte Amount field
  Displays the amount of radial blur for the matte. Editable.

Matte Rotation field
  Displays the angle of rotation for a radial blur for the matte. Editable.

Lock To Front button
  Enable to keep the matte values the same as their corresponding values for the front clip.

Invert Matte button
  Enable to blur the region outside the area defined by the matte.

## Channel Settings

RGB Channels | YUV Channels

Weight field
  Displays the weighted value of the channel.

Position X field
  Displays the horizontal offset of the channel.

Position Y field
  Displays the vertical offset of the channel.

YUV Colour box
  Select whether to affect Luma or Chroma only, or include both when blurring in YUV colour space.

## Blending Settings

Screen option box
  Select a logical operation that can be used to blend the front clip and the result clip.

Transparency field
  Displays the percentage of blending when the result is composited on the front clip. Editable.

Use Matte button
  Enable to apply the blur with the areas defined by the matte.

## Kernal Settings (Defocus Only)

The kernel is the defocus blur shape. The shape of the kernel is determined by its number of sides, its rotation, and the shape of its S-curve. This curve represents the shape of the pattern, from its centre to the outside. The default S-curve defines the softness of the blur. You can change the curve by manipulating the two points that define the curve, or you can add points to the curve. Use the Edit Mode box to add and delete points on the curve.

Sides field
  Displays the number of sides in the kernel shape. Editable, if kernel information is not attached to the node.

Rotation field
  Displays the angle of rotation of the kernel shape. Editable, if kernel information is not attached to the node.

Bokeh Type box
  Select whether to use a round or angle bokeh curve to define the kernel shape.

Curvature field
  Displays the amount of curvature applied to a round bokeh kernel shape. Editable.