Ahhh sorry for the lineart input my friend! Very good shading tutorial though. Breaks it down A-B-C style. Hmm...allow me to make a correction to myself. Pillow Shading at most times can be pretty terrible unless the light source that you designate comes directly towards them and pillow shading can also look pretty ugly on large images. So correction is, use pillow shading on the least occasions and keep the shading simple. I shade in layers...ex, I start off with the darkest shade and work my way to the lightest, picturing and getting a "feel" of where the light source may hit the object. You'll get the hang of it.