I've decided to start painting the corset firstly It's necessary to use the Brush Tool with the same adjustments we've applied earlier. We have to take care of the fact that the corset is situated on a separate layer and the next drawing should be done by creating a new layer above the first one and combining them both in a group: Layer ? Create Clipping Mask (ctrl+g). For the beginning we should draw the stitches, using the brush of 6 px. Minimizing the size continuously till 1 px, make some chaotic brush's motions to imitate the lace.



Apply on this layer next selection: Filter ? Artistic ? Smudge Stick.



Merge down these layers: Layer ? Merge Down (ctrl+e) and use the Pen Tool with Make Selection command to mark out a part of the corset that will be situated in the shadow.



Dark out the marked zone with Image ? Adjustments ? Brightness/Contrast.



Move off the marked zone: Select ? Deselect (ctrl+d) and create a new layer. Group them out (ctrl+g) and apply the Gradient Tool to make lighter the brighter zones of the corset.