# :icon-versions: 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:

<video autoplay loop muted playsinline>
   <source src="/static/blur/blur_demo.mp4"/>
</video>
<p/>

Blur affects all parameters, not just position:

<video autoplay loop muted playsinline>
   <source src="/static/blur/blur_rotate.mp4"/>
</video>
<p/>

### Controlling Blur

There are three controls for adjusting blur:

{.compact}
Parameter          | Meaning
---                | ---
Enable Motion Blur | Whether blur is enabled at all.
Blur Amount        | How much blur occurs. 0% = none, 50% = half, 100% = 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 100%, the blur stretches
from the last frame position to the current position. At an amount of 0%, no
blur is applied at all.

<video autoplay loop muted playsinline>
   <source src="/static/blur/blur_amount.mp4"/>
</video>
<p/>

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.

<video autoplay loop muted playsinline>
   <source src="/static/blur/blur_samples.mp4"/>
</video>
<p/>