I made a simple mechanical object with five parts in Maya. Unfolded the UV map. Made an image texture in Photoshop. Loaded the file in the material. It worked fine. I'm now trying to apply a bump to the object by using the same texture image from photoshop (to have all the details in the right place) but Maya will not allow me to decrease the bump value under 1. The slider won't move, and I cannot enter another value.