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.. _bpy.types.RenderSettings.use_motion_blur:
***********
Motion Blur
***********
.. reference::
:Panel: :menuselection:`Render --> Motion Blur`
Blender's animations are by default rendered as a sequence of *perfectly still* images.
While great for stop-motion and time-lapses, this is unrealistic, since fast-moving
objects do appear to be blurred in the direction of motion,
both in a movie frame and in a photograph from a real-world camera.
.. figure:: /images/render_cycles_render-settings_motion-blur_example-cubes.jpg
Motion blur example.
(`blend-file <https://archive.blender.org/wiki/2015/uploads/0/03/Blender2.65_motion_blur.blend>`__)
.. _bpy.types.RenderSettings.motion_blur_position:
Position
Controls at what point the shutter opens in relation to the current frame.
:Start on Frame: Shutter is starting to open at the current frame.
:Center on Frame: Shutter is fully opened at the current frame.
:End on Frame: Shutter is fully closed at the current frame.
.. _bpy.types.RenderSettings.motion_blur_shutter:
Shutter
Time (in frames) between when the shutter starts to open and fully closed.
For example, shutter time 1.0 blurs over the length of 1 frame.
.. _bpy.types.CyclesRenderSettings.rolling_shutter_type:
Rolling Shutter
Creates a :term:`Rolling Shutter` effect.
:None: No rolling shutter effect.
:Top-Bottom: Renders rolling shutter from the top of the image to the bottom.
.. _bpy.types.CyclesRenderSettings.rolling_shutter_duration:
Rolling Shutter Duration
Controls balance between pure rolling shutter effect (if the value is zero)
and pure motion blur effect (if the value is one).
.. note::
If there are particles or other physics system in a scene,
be sure to bake them before rendering,
otherwise you might not get correct or consistent motion blur.
.. seealso::
Each object has its own settings to control motion blur.
These options can be found in the Object tab of the Properties.
See :ref:`object setting <bpy.types.CyclesObjectSettings.use_motion_blur>` for more information.
.. _bpy.ops.render.shutter_curve_preset:
Shutter Curve
=============
Curve defining how the shutter opens and closes.
The X axis is time, Y values of 0 mean fully closed shutter, Y values of 1 mean fully opened shutter.
The default mapping is set to when shutter opens and closes instantly.
Limitations
===========
- Camera motion blur does not work for :doc:`Orthographic Cameras </render/cameras>`.
- Motion blur does not take into account the movement of :doc:`Lights </render/lights/light_object>`.
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