# Motion Blur

Curves automatically applies motion blur to fast moving objects. The faster an object moves, the larger its blur. This can be seen when adjusting the speed ramp of an animation curve:

Blur affects all parameters, not just position:

Be careful with fast rotating objects; objects rotating quickly may appear to grow in size with blur enabled. This can be reduced or eliminated by configuring blur settings or disabling blur.

# Controlling Blur

There are three controls for adjusting blur:

Parameter	Meaning
Enable Motion Blur	Whether blur is enabled at all.
Blur Amount	How much blur occurs. 0 = none, 0.5 = half, 1 = full.
Blur Samples	How many copies are drawn. Fewer = faster, more = better blur quality.

Decreasing the blur amount shrinks the distance between the current position and position considered for blurring. At an amount of 1, the blur stretches from the last frame position to the current position. At an amount of 0, no blur is applied at all.

Decreasing the number of samples decreases how many copies of the image are drawn. This improves processing time but reduces the quality of the blur effect.