Ok, listen carefully, I mean read carefully. Do you have Photoshop? Noise texture in Maya File cannot be exported to Photoshop. It only helps you to texture effects. You need to make your own textures in Photoshop using it's filters, to make what you like. The usual size is 2x2", to make it seamless. Now, if you like what you did in Photoshop, save it as JPEG, now open your Hypershade , Material Editor, and assign your JPEG file to the node (Phong,etc) and then you can add noise or whatever texture in Maya file, then assign it to your model. If you don't like what you see, repeat again, starting in Photoshop. If you know your tools in Maya where to look for them, I don't have to give you one by one.