Well, I just open texture in SAI and hold [Ctrl+A] to select all. And then I copy it[Ctrl+c] and paste[Ctrl+v] on my canvas. Then I got a layer of texture. And then I change "Blend mode" of texture's layer to "Overlay" or whatever I want! XD
So i hit writers block a week ago and no matter what i listened to or looked at i couldn't get inspiration. But when i saw this something instantly hit me. So write now i'm in the process of writing something for this but it may not be to good. Would you mind reading it when i finish it or when you have time?