Object Motion Blur

Object Motion Blur

With a real-life camera, motion blur arises when an object flies past the camera at great speed (object motion blur) or when the camera pans rapidly (scene motion blur). The advantages of object motion blur (OMB) are that the effect is rendered quickly and there are no stroboscope effects. For an object to have motion blur in the render, this setting must be enabled and the object must have a Motion Blur tag.

A few limitations are associated with object motion blur. For example, only position, scale and rotation animation can be blurred (so a beating wing animated using bones cannot have motion blur applied to it). Also, anomalies may appear at the frame’s border and the animation may flicker.

Object motion blur is limited to a maximum frame size of 2,000 x 2,000 pixels and is automatically disabled at resolutions higher than this. Also, particles cannot be blurred. Furthermore, avoid using OMB with post-processing effects (e.g. lens flares), since this may lead to unexpected results.

These limitations notwithstanding, motion blur can create a very natural effect with its analytical blurring. Object motion blur can create superb results with stills as well as with animation.