Its OK its just your bump depth default is set to 1 try .1, go to hypershade click on your texture above your texture in the hypershade window there should be a box with two arrow side by side, with the texture selected click on that, that should bring up your texture below with all its conections click on the checkered one(2D texture file) in the attribute on the right hands side should say bump depth change that to say .1 or untill you are happy..........dave