.. _layer_motion_blur: ######################## Motion Blur Layer ######################## .. figure:: motion_blur_dat/Layer_blur_motion_icon.png :alt: Layer_blur_motion_icon.png :width: 64px .. _layer_motion_blur About Motion Blur Layer: 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. .. _layer_motion_blur Parameters of the Motion Blur Layer: Parameters of the Motion Blur Layer ----------------------------------- The parameters of the ``Motion Blur Layer`` are: +----------------------------------------------------------------------------------+----------------+-------------+ | Name | Value | Type | +----------------------------------------------------------------------------------+----------------+-------------+ | |Type\_time\_icon.png| `Aperture <#Aperture>`__ | 0f | time | +----------------------------------------------------------------------------------+----------------+-------------+ | |Type\_real\_icon.png| `Subsamples Factor <#Subsamples_Parameters>`__ | 1.000000 | real | +----------------------------------------------------------------------------------+----------------+-------------+ | |Type\_integer\_icon.png| `Subsampling Type <#Subsamples_Parameters>`__ | Hyperbolic | integer | +----------------------------------------------------------------------------------+----------------+-------------+ | |Type\_real\_icon.png| `Subsample Start Amount <#Subsamples_Parameters>`__ | 0.000000 | real | +----------------------------------------------------------------------------------+----------------+-------------+ | |Type\_real\_icon.png| `Subsample End Amount <#Subsamples_Parameters>`__ | 1.000000 | real | +----------------------------------------------------------------------------------+----------------+-------------+ .. _layer_motion_blur Aperture: Aperture ~~~~~~~~ The ``Aperture`` parameter indicates the number of frames used to compute the effect of motion. The concept is analogous to the shutter speed or exposure time in photography. .. _layer_motion_blur Subsamples Factor: Subsamples Factor ~~~~~~~~~~~~~~~~~ The ``Subsamples Factor`` affects the number of Subsamples to be computed. Using a high value, the smudge is finer, but the rendering takes longer as it involves much more computations. .. _layer_motion_blur Subsampling Type: Subsampling Type ~~~~~~~~~~~~~~~~ The ``Subsampling Type`` parameter indicates the type of Subsampling used between: - Constant - Linear - Hyperbolic .. _layer_motion_blur Subsample Start Amount: Subsample Start Amount ~~~~~~~~~~~~~~~~~~~~~~ The ``Subsample Start Amount`` parameter indicates the value of Subsample at the start. For example, if ``Subsample Start Amount`` is set to 0, it won't have any blur on start. Otherwise the motion of objects from lower layers begin as a smudge. .. _layer_motion_blur Subsample End Amount: Subsample End Amount ~~~~~~~~~~~~~~~~~~~~ The ``Subsample End Amount`` parameter indicates the value of Subsample at the end. For example, if ``Subsample End Amount`` is set to 0, the last state of the objects from lower layers will appear without any blur. .. _layer_motion_blur Samples: Samples ------- +--------------+-------------------------------------------------------------------+-------------------------------------------------------------------+ |   | From Subsample Start 0 to Subsample End 1 | From Subsample Start 1 to Subsample End 0 | +==============+===================================================================+===================================================================+ | 0f–0f | .. figure:: motion_blur_dat/Motion_blur_0-1_aperture_0-0f.gif | | | :alt: Motion_blur_0-1_aperture_0-0f.gif | | | | | | | +--------------+-------------------------------------------------------------------+-------------------------------------------------------------------+ | 0f–24f | .. figure:: motion_blur_dat/Motion_blur_0-1_aperture_0-24f.gif | .. figure:: motion_blur_dat/Motion_blur_1-0_aperture_0-24f.gif | | | :alt: Motion_blur_0-1_aperture_0-24f.gif | :alt: Motion_blur_1-0_aperture_0-24f.gif | | | | | | | | | +--------------+-------------------------------------------------------------------+-------------------------------------------------------------------+ | 24f–24f | .. figure:: motion_blur_dat/Motion_blur_0-1_aperture_24-24f.gif | .. figure:: motion_blur_dat/Motion_blur_1-0_aperture_24-24f.gif | | | :alt: Motion_blur_0-1_aperture_24-24f.gif | :alt: Motion_blur_1-0_aperture_24-24f.gif | | | | | | | | | +--------------+-------------------------------------------------------------------+-------------------------------------------------------------------+ | 24f–0f | .. figure:: motion_blur_dat/Motion_blur_0-1_aperture_24-0f.gif | .. figure:: motion_blur_dat/Motion_blur_1-0_aperture_24-0f.gif | | | :alt: Motion_blur_0-1_aperture_24-0f.gif | :alt: Motion_blur_1-0_aperture_24-0f.gif | | | | | | | | | +--------------+-------------------------------------------------------------------+-------------------------------------------------------------------+ Notes: - Rows in table – ``Aperture`` value from beginning (frame 0) to end (frame 120). - Columns in table – ``Subsample Start Amount`` value and ``Subsample End Amount`` value :download:`Sample file ` .. _layer_motion_blur See also: 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. .. |Type_time_icon.png| image:: images/Type_time_icon.png :width: 16px .. |Type_real_icon.png| image:: images/Type_real_icon.png :width: 16px .. |Type_integer_icon.png| image:: images/Type_integer_icon.png :width: 16px .. |Layer| replace:: :ref:`Layer ` .. |Radial_Blur_Layer| replace:: :ref:`Radial Blur Layer ` .. |Blur_Layer| replace:: :ref:`Blur Layer `