Surface noise can have various different reasons. Problems with the alignment are quite likely. Especially if you have a difficult material and, as Oliver has already pointed out, perhaps too many images. The problem then is that neighboring images may have too small a basis (relation of distance from each other to the distance to the object. Another possibility is noise in the images.
RC works in ways that make it almost impossible to get perfect results with flawed image sets. You just cannot save it by tweaking the settings. The only feasible way is to learn to take the images properly. Sounds frustrating if you are a beginner but I learned that the hard way… 