Hello there! I would say that the advice given for turning up the contrast of a separate bump map was good. I have no experience of Vue, but fundamentally it will work the same as Bryce I presume. Increasing specularity/highlight on the bump channel would help too. I must add that the original image provided in the pack is not as dull as the rendered examples here, and has an accurate contrast level! :) (as the attached section of the original shows!) Hope you get it sorted to your satisfaction! :)

Adam Benton | www.kromekat.com