How to enable and control motion blur?
To enable motion blur:
Motion Blur is enabled in the Camera/Postprocessing tab of the Corona Render Settings. Motion blur from camera movement and object movement can each be enabled separately:
Frame offset:
One of the parameters affecting the appearance of the motion blur effect is the frame offset. It defines the offset (in frames) from which the motion blur effect is calculated. A value of -1 means that motion blur is calculated from the moment right before the current frame up to the current frame, a value of 1 means that motion blur will be calculated starting from the current frame looking at motion that comes next, and a value of 0 (the default value) means that motion blur will be calculated exactly centered on the current frame, looking at motion that comes slightly before through to slightly after the current frame.
Transformation segments:
Quality of the non-linear rigid (transformation) motion blur. Increasing this value increases the quality at the expense of some rendering speed and memory usage. Setting this value too low can result in movement stutter and/or artifacts.
Note: It is recommended to keep the transformation segments at the default value.
Shutter Speed:
The shutter speed of the camera determines the "strength" of the motion blur - a higher value means a faster shutter speed and less motion blur, while a lower value means a slower shutter speed and more motion blur:
Shutter curve:
Shutter curve allows you to fine tune the movement and look of how the motion blur results will appear in your rendered image. You can adjust the aspect of the motion blur by modifying the shutter curve. This simulates how fast or slow the shutter opens for each frame and enforces a good sense of motion on your subject. A more detailed explanation about this phenomenon -Camera Motion Blur Shutter Curve.
Various types of Shutter curve results can be seen in the examples below.
Examples:
In this example scene, using a free model from the internet, both the object and the camera were animated, and the shutter speed for the camera was set to 30 (for 1/30th of a second). You can see the results of changing various parameters below:
No motion blur enabled
Model by Petar Jedvaj Royalty Free License
Motion blur enabled for the camera movement only
Motion blur enabled for the object movement only
Motion blur enabled for both camera and object movements
Shutter speed for the Corona Camera changed to 60 (for 1/60th of a second, faster shutter, less blur)
Shutter speed for the Corona Camera changed to 15 (for 1/15th of a second, slower shutter, more blur)
Shutter Curve
Default Shutter curve: