All these things are from one 1024 by 512 texture map. I was going to have them in different texture map but I thought that I could just optimized them. As a result, putting the details proved to be much more difficult, and they turned to be much low res. I can barely show any details other than their actual color. I just used the Photoshop Fiber filter to add some sort of surface detail. I didn't like the fact that it didn't tiled vertically.