nruddock,

I'm not sure what you mean by "color." The height of the bump is directly related to the whiteness of the bumpmap. White is max "up" as dialed in, black is at the base level of zero.

Acadia,

In the above texture, you would have to create a greyscale image from the texture map (this could be done with floor or clamp nodes, but is probably easier in Photoshop), invert it so that the black hairs are now white and then use a paintbrush to blacken everything else so it has no effect. Plug this into the Bump or Displacement Node and use a setting somewhere around 0.003 to start. Want some fun, plug it into the Displacement Node and use a setting of  5! BoogaBooga!!

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