Quick Tip: V-Ray Shadows (Patreon)

The default shadow settings in V-Ray can create very poor results in small scale scenes, such as this:

The solution is to change the Shadow bias on all your lights from the default 0.02 to a very small value like 0.001.

Problem solved!

And to confirm that a low shadow bias is more correct, here's a comparison with Arnold's default settings on a one millimeter cube: