I did the shirt a lot like I did the pants. First I laid down a base texture layer with no shades or wrinkles, etc. Put in details like pockets and a zipper, and once I had that done, THEN I went in and added wrinkles the same way I did the pants.

I did do one thing significatnly differently with the torso then I did with the pants. I put seam detail myself to emphasize the seams. After making the base texture above, I switched to the Pen Tool and drew in lines for all the seams. They'll be on their own layer so Create a new layer above your base texture and choose a darker color from the image and then in the color picker make it even darker. This will be the color of the seams.

Pay attention because if you've never done this, it's easy to miss this and get confused. Right now the lines are just vector paths. They aren't actually apart of the image yet. We are going to "Stroke" the paths with the paintbrush tool. But first we need to set the paintbrush tool the way we want it. So go to the paintbrush tool, set the brush size to 1 or 2, and set the opacity to 100%.

Now select the pen tool again and Right-Click anywhere in your image and choose Stroke Path from the drop-down.

From the window that comes up, choose Brush from the drop-down, make sure that simulate pressure is NOT checked and click OK.

Now we're going to make the highlights around the seams. Right-click again and choose Delete Path from the drop-down. Now with the pen tool draw in a few areas where there would be highlights on the seams. Create another new layer and set your current color to a ligher version of your main color (near white-ish if nessecary) and stroke the new paths.

Once I was happy with the seams, I created two new layers, a Shds and HLs layer. (Shds Mode set to Multiply, and HLs Mode set to Screen) and began painting in wrinkles just like I did earlier with the legs.

Having a reference of what the wrinkles should look like well be very helpful here so if you can find one, that's best.

Just like with the pants, I started out with rough scribbly marks to get the shape started and laid out. Then I went back in and smoothed them out. The jacket has a seam that you need to watch for. Since the front isn't mirrored (to avoid overly obvious symmetry in the texture) one side is exposed here. You'll need to make sure that the seam on that side of the short isn't too obvious.

Once I had the shds in place, I put in the highlights. Same as before - scribbly placeing and then smoothing and putting in details.

Once I was done with the shades and highlights I did an extra step. I created another layer above them all and picked a dark grey / grey-bluish color and painted in around some of the darker shaded areas, and then went in and smudged them to blend it with the colors behind. This was just to give it some better color depth.

Now to do the arms..

Since the arms are a part of the jacket, you should make sure to do them very similar so that they flow together. So you'll use a lot of the same base texture on the sleeve that you used on the torso, and do yoru shades and highlights in the same color/lighting.

Same as all the other things. And when everything is done, save it as a flattened, sharpened, tga file and update max again.