Blur Layer

Layer_blur_blur_icon.png

About Blur Layer

Blur is a graphical effect that aims to imitate an unfocused image. In a photography context blur can occur when the focal point of the lens is not at the right position of the target of the photograph. Also blur can have other origins. Blurs can happen as the result of a poor exposure during its recording (too long exposure time for a large movement of the object or a high movement of the recorder). Also blurring occurs when you use a very wide aperture (f4). In that case the objects that are out of focus are very blurred compared to the situation where the aperture is fully closed (f22).

In a graphical context, blurs are effects that imitate those situations (with more or less success).

Parameters of the Blur Layer

The parameters of the Blur Layer are:

Name Value Type
Type_real_icon.png Z Depth 0.000000 real
Type_real_icon.png Amount 1.000000 real
Type_integer_icon.png Blend Method Composite integer
Type_vector_icon.png Size 6.000000pt,6.000000pt vector
Type_integer_icon.png Type Fast Gaussian Blur integer

Size

The Size parameter controls the size of the blur. Depending on that value the blur can have different effects. Note that rendering time quickly increases as you increase the size parameter, so be careful.

This parameter is a compound value of two real numbers, x and y. Each of them indicates the size of the blur along that direction.

Type

There are 5 types of blur:

Samples

Star animation

If you wonder how the animations were made (sample file):

  • a Star Layer is positioned at the center of the Frame, with an Outline Layer of width 0.05u
  • the animations have 120 frames, and the Size parameter of the blur goes from 0u,0u to 1u,1u
  • the rendering settings are set to Quality 9 and Anti-Aliasing 1
Fast Gaussian :
Fast Gaussian
Box :
Box
Cross Hatch :
Cross Hatch
Disc :
Disc
Gaussian :
Gaussian

Fast Gaussian

Fast Gaussian Blur

Fast Gaussian Blur  
blur_dat/BlursFastGaussian.png
blur_dat/Blurs2FastGaussian.png

Box

Box Blur  
blur_dat/BlurBox.png
blur_dat/Blurs2Box.png

Cross Hatch

Cross Hatch Blur  
blur_dat/BlurCrossHatch.png
blur_dat/Blurs2CrossHatch.png

Disc

Disc Blur  
blur_dat/BlurDisc.png
blur_dat/Blurs2Disc.png

Gaussian

Gaussian Blur  
blur_dat/BlurGaussian.png
blur_dat/Blurs2Gaussian.png

Fast Gaussian Blur over all the layers

Fast Gaussian Blur over all the layers
blur_dat/Blur.png

See also

  • Radial Blur Layer with a radial control of the size of the blur.
  • Motion Blur Layer a type of blur that aims to simulate a motion blur (the one that happens when the object’s movement is too fast for the exposure time). It is controlled by a single parameter called “Aperture”.