This time ill show you a couple ways to get rid of the color bleeding in Vray.
First of all what is color bleeding? well color bleeding is an effect of the GI bounches in vray so that the bounched light also bounches color. so for examples if you have a white room with an red floor. the whole scene would look redish.

somethimes this is a effect we want, but not always.
So there are a couple of ways to deal with these.