Saturday, April 28, 2012

Post motion blur effect comparison

I have results from 3 different post motion blur effects.

1. Furnace motionBlur in Nuke with no motion vector.
2. Reel Smart Motion Blur using la maison 2d motion vector shader.
3. Nuke's built-in vector Blur effect using Maya's 2d motion vector render pass (normalized one).

Here's the comparison in color channels. 

 Apparently, they all look very similar and showing a reasonable quality.
But in alpha channel, there are some differences.

The first one, Furnace motionBlur shows some artifacts. For example, you can find some smudging around the ball especially when the ball is being released from the hand.

This not-so-clean alpha is not desirable for compositing. Since the Furnace motionBlur was not helped by any motion vector source, this kind of artifact should be unavoidable.

The other two effects are done with a proper motion vector source provided and did generate a relatively clean and smooth alpha.

RSMB still produced a better alpha than Nuke's vectorBlur.
While the ball is exiting the frame, the edge of the ball looks better in RSMB's case ( the center )than Nuke's vectorBlur ( the right ).

Overall, the winner is... Reel Smart Motion Blur (imho).


  1. This comment has been removed by the author.

  2. This comment has been removed by the author.

  3. This comment has been removed by the author.

  4. When it's about home or small commercial cooling we think about electricity savings.I appreciate this blog to share this information.but in office what is the environment and culture? Are people dressed in business casual, jeans and t-shirts, or full-on suits? Get all concept of commercial air condition system in office from you are finding human comfort and safety don't forget to get touch with our daily blogs.

  5. This comment has been removed by the author.


  6. Found your blog. It is full of really good information. Thank you for sharing. If you ever need service on air conditioning repair please visit us at We would love it if you would have a look at some of our blogs and let us know your thoughts.