STEP BY STEP CREATE MOTION BLUR IN BLENDER
01 SHUTTER POSITION
The first thing to set is the position at which the shutter opens in relation to the current frame. You have three options with the position either being ‘Start on Frame’, ‘Center on Frame’ or ‘End on Frame’. This is set to ‘Center on Frame’ by default and that would be the one you’ll always want to use.
02 UNDERSTAND YOUR SHUTTER
Before we determine how much motion blur we want to add, we need to understand how a camera creates motion blur. Real-world cameras rely on a shutter angle between 0-360 degrees, with more blur at higher degrees. For DSLR cameras this angle is determined by the shutter speed and frame rate. A common angle is 180 degrees, achieved by setting the shutter speed to double what the frame rate is, like 1/50th of a second at 24fps.
03 SPECIFY THE MOTION BLUR AMOUNT
The shutter angle is replicated within Blender by using the Shutter parameter, which has a range of 0-1 that’s similar to the 0-360 degree range found in real cameras. By default this is set to 0.5, the most common option for videos. This number can be decreased to reduce the motion blur or increased to make the effect more pronounced.
04 ROLLING SHUTTER EFFECT
Within the Motion Blur panel it’s also possible to create that rolling shutter effect I mentioned earlier. This is set to None by default, but can be changed to ‘Top-bottom’ if you want the effect visible. The Rolling Shutter Duration determines the degree of the effect, with 0 being a pure rolling shutter effect and 1 a pure motion blur effect.