Motion Blur

Reference

Panel: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.

../../../../../_images/render_cycles_settings_scene_render_motion-blur_example.jpg

Motion blur example (camera zoom).

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.

Options

../../../../../_images/render_cycles_settings_scene_render_motion-blur_settings.png

Motion Blur settings.

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.
Shutter (Speed)
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.
Shutter Curve

Curve defining how the shutter opens and closes.

The X axis is time, Y values of 0 means fully closed shutter, Y values of 1 means fully opened shutter. Default mapping is set to when shutter opens and closes instantly.

Shutter Type

Creates a “rolling shutter” effect.

In real CMOS cameras the sensor is read out with scanlines and hence different scanlines are sampled at a different moment in time. This, for example, make vertical straight lines being curved when doing a horizontal camera pan.

None
No rolling shutter effect.
Top-Bottom
Renders rolling shutter from the top of the image to the bottom.
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).

Warning

An object modifier setup that changes mesh topology over time can not render deformation motion blur correctly. Deformation blur should be disabled for such objects.

Common examples of this are animated Booleans, Deformation before Edge Split, Remesh, Skin or Decimate modifiers.

See also

Each object has its own settings to control motion blur. These options can be found in the Object tab of the Properties editor. See object setting for more information.

Example

../../../../../_images/render_cycles_settings_scene_render_motion-blur_example-cubes.jpg

Motion blur example. (blend-file)