Camera IMBlur Operator

The Camera IMBlur operator corrects a problem in which Image Motion Blur applied to a Particle Flow system might not render properly when the camera is animated. The operator adjusts the particle speed, accounting for camera motion, before it's passed to the viewport display and/or the renderer. Internally, the Particle Flow engine continues to use the true particle speed for the animation.

Add the Camera IMBlur operator to any event to which you've applied Image Motion Blur. Alternatively, to apply Image Motion Blur to the entire animation, add the Camera IMBlur operator to the global event (by default, PF Source 01), and turn on Image Motion Blur for the global event (via Properties) as well.

Tip: Using the Lines display type makes it easy to see the effect that the operator has on particle motion in the viewports.

Interface

Use Active Camera
When on, uses the camera assigned to the active viewport. When off, you can assign a different camera to the operator. Default=on.
Camera
Click the None button and then select a camera in the scene whose motion the operator will use. Thereafter the camera name appears on the button. Available only when Use Active Camera is off.
Use Event IMBlur Multiplier
- When on, uses the event's Image Motion Blur multiplier (Select the event. Right-click and choose Properties Object Properties dialog Motion Blur group) for the camera motion. With this option on, it's not necessary to synchronize the operator's Multiplier value when changing the event's motion blur properties.

Alternatively, you can exaggerate the camera motion by setting up a specific Multiplier value in the interface. Default=on.

Multiplier
The blurring value specific to the operator. For example, you can reduce the relative amount of camera motion blur by setting the operator's Multiplier value to less than 1.0. Available only when Use Event IMBlur Multiplier is off.