Hello all. My first post here.
I have been using Zbrush for a while, but I am mostly just a subdivision, hardsurface 3D modeler. I have recently found a huge fascination and drive for learning to sculpt realistic clothing and such - backpacks etc. Due to this I have started to study the workings of drapery in order to get the basics of how things fold and flow along the objects underneath. Still, I have only really found guides to this around doing it in 2D, drawing and painting.
I know many game studios and such are utilizing the marvelous designer software when creating realistic clothes and such, nbut I really want to sculpt it, I dont know I find it soothing to be able to create all them folds and such especially in contrast to my normal work in hardsurface sub-div.
So what I am asking for here is tutorials, video is preferred, that shows a artist going through the process of creating realistic clothing from scratch in Zbrush. When I say from scratch I do not exclude the use of a base mesh from another 3D software etc. If I could get to watch someone make a realistic detailed backpack it would really blow my mind as that is what I am working on at the moment 
So, thanks before hand all you here on the central.