Motion Blur Layer
Contents
About Motion 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). Motion Blur Layer allows to simulate the blur of picture, that arises by movement.
Specific parameters
The parameters of the Motion Blur Layer are:
| Name | Value | Type |
 Aperture
|
0f | time |
 Subsamples Factor
|
1.000000 | real |
 Subsampling Type
|
Hyperbolic | integer |
| Subsample Start Amount
|
0.000000 | real |
| Subsample End Amount
|
1.000000 | real |
Aperture
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Subsamples Parameters
- Subsamples Factor
- Subsamples Factor affects the number of subsamples to be computed. Using a high value the smudge is finer, but the rendering is longer as it involves much more computations.
- Subsampling Type
-
- Constant
- Linear
- Hyperbolic
- Subsample Start Amount
- If is value of Subsample Start Amount 0, has not any blur on start. Otherwise motions of objects from lower layers begin as a smudge.
- Subsample End Amount
- If is value of Subsample End Amount 0, is last state of the objects from lower layers without any blur.
Samples
| From Subsample Start 0 to Subsample End 1 | From Subsample Start 1 to Subsample End 0 | |
|---|---|---|
| 0f–0f | 
| |
| 0f–24f | 
|
|
| 24f–24f | 
|
|
| 24f–0f | 
|
|
- Note
- Rows in table – Aperture value from begin (0 frame) to end (120 frame).
- Columns in table – Subsample Start Amount value and Subsample End Amount value
Synfig file from sample test - Media:motion_blur.sifz
See also
- A short description of the blur layers can be found here: Layer
- Radial Blur Layer with a radial control of the size of the blur.
- Blur Layer mostly used types of blur.
