When I started working with VRay renderer, I discovered that as of rendering there are many colorfull shadows spread around the object. I realized it was something to do with setting but being new to this engine I also knew that it will take me ages to look for the button responsible for this effect.
Luckily, I found this cool tutorial where the author not only names the symptom, but also gives a solution to the problem.
It is called a Color bleeding and there are several ways to solve it.
Here you'll be able to learn how.
Sure, you will find it helpful.
