Ray Tracing - Motion Blur

Here are some simple pictures of a ray traced scene, including motion blur.
I already had the lighting and shading part of the ray tracer done, so I just
left it as it is. I also added a velocity vector to each object, which allows
them to have differing motion blur effects over the same time period.

Image 1: 3 balls all moving with differing velocities and directions.

Image 2: The same 3 balls, with only 1 in motion.

Imabe 3: I added a sort of floor under the 3 balls to show their shadows.

Image 4: I quickly attempted to give the balls certain movements similar to juggling.

Image 5: I added some movement to the floor as well.