Well, if it's ok if I jump in here I'd like to know how to adjust the displacement amount of a displacement map regardless of whether bump mapping is the better choice for elephantinc.

Could someone please explain how to adjust the displacement amount?

I've been trying to figure out how to adjust the amount for a while. It's so simple to do with bump maps, but I see no obvious method of doing it with displacement maps.

Thanks to anyone who can help. And thanks for asking for me elephantinc!