Pixolator has posted a new video featuring the beefed up BPR in the upcoming ZBrush 4R2b. This video explains the steps he used to create a realistic skin surface.
“In the previous “Ready, Set, Render!” thread, I demonstrated the use of BPR when rendering a ‘hard-surface’ model. This time, I opted to demonstrate the use of Z4R2b BPR for rendering an organic surface, in particular, a skin surface. For this test, I used an excellent head sculpt created by ZBrush artist Majid Esmaeili.” -Pixolator
Check out the thread and view the video at ZBrushCentral.