I am glad you like what I have done. It's still a work in progress but it's getting there.
The sweater was done by creating a layer and painting over the existing clothing. I used a low opacity hard brush and built up the color. The shadows were more opaque than the highlights. I then created a new layer and painted over the first layer in broad sweeping strokes with what a lot of people call a "hair brush" It looks like a collection of of fine dots. I set the spacing to 1%. This added the first part of the sweater texture. I then added a small bit of noise to that layer. I merged the two layers. This is the base sweater.
To add shading, I copied the original base layer of Vic and pasted that in a layer above the base sweater layer. I then set that layer's blend mode to Hard Light. I then grouped the layer to the base sweater layer. Presto! Shading! I adjusted the contrast with Curves until the shading looked right. Now, we're cooking.
Above these layers, I created a layer and filled it with the Herringbone 2 pattern. I use this pattern a lot to simulate weaving on sweaters and chainmail. However, it is flat and does not follow the contours of the body nor clothing. To solve this, I use the Displacement filter and set the displacement at 20% and 20%. For a displacement map, i used the .psd file that I was painting on.
The displacement worked perfectly. I removed the parts I did not need by making a selection from the base sweater (because it was covering only what I needed to cover) and deleted what was outside the sweater. I locked the transparancy and Guassian Blurred the layer very slightly. Then I set the blend mode to Soft Light and set the layer's opacity to 30%. Woo!
Almost done... I made some adjustments to the collar by creating another layer, setting it on Overlay, and painting over the color. I then adjusted the color by using Hue/Saturation until it looked right. Some of the shadows looked too dark so I created a new layer, set it to Overlay also and painted in white with a very low opacity soft brush.
