My Name is Rodrigue Pralier, I currently work for Electronic Arts Montreal.
I'm going to show you all how I created my Rock n Roll image. For my latest personal project I wanted to model an old rock and roll character. Within this 'making of', I will show you all the different steps, from modeling the pieces within Zbrush, to the final retouching up in Photoshop.
I will presume that you all have some knowledge of polygonal modeling as I will not be showing how I did the different low-res pieces. I used the same process you're about to see for all the pieces.
Before starting anything you have to now exactly what your concept is. I used to do some 2d concepts but for this one, I knew exactly what I wanted to do, so I took only a few photographic references.
Once you know where you are going you can start to model the low-res version of the different pieces of your scene.
You need to unwrap the UVs of all your models (I used unfold3D to do it quickly). All your models have to be in quads, if not you will experience problems when you start to model in Zbrush.
Before importing your model into Zbrush you need to prepare your work space. I have a multiprocessor in my computer, so I activated the MULTIDRAW and THE MULTIRENDER.
To see if it's worth it on yours launch the TEST MULTITHREADING.
Then I go to STROKE and put 4 in MOUSE AVG (you will avoid some shaking effects of your pen)
Now I can import my model and start working. Personally I like to work with the INFLAT tool and smooth curve.