In what order do most people create these maps? What are each of these used for? I'm familiar with making specular color maps but when it comes to spec power and glossiness I find myself confused. I understand that spec power is used to increase or decrease the intensity of the specular (making the specular more intense for metal than for skin, etc). Is it a greyscale map? What about glossiness? Isn't it used to achieve the same effect?
Thanks in advance.