Using Optical Flow in Nuke to
Create Motion Blur
Let’s face it, post motion blur effects are great, especially when
you’re under a tight deadline. There are many great plugins that
help achieve this effect, but if you’re using Nuke you can use the
sofware to autiomatically calculate the motion vectors and apply
the blur for you! Pretty neat, huh? Well here’s a quick tip and
overview of the process to get you started....
If you want to follow along with my image you can download the
sources files here.
Ok, first hit
R on your keyboard or select the
Read node to import your footage into Nuke.
Next to to the
Etc... button on the left, then
select
All Plugins. If nothing shows up just hit
the update button then go back. Next go to the letter
O, and select the
Oflow.
Add this to your scene, change the
Speed
parameters to
1. This way it doesn’t effect the
speed of your clip.
Now just play with the
Shutter Time and
Shutter Samples parameters till you get the
desired motion blur effect.