Check out this awesome Zbrush Sculpting tutorial created by the guys from FlippedNormals.com. It’s a timelapse sculpting tutorial with very useful tricks and tips narration by Henning and Morten, absolute gold.
In this tutorial Henning and Morten discusses the process involved with sculpting a White Walker from Game of Thrones in ZBrush. When sculpting, start out with the big shapes, such as the overall silhouette, bony landmarks and so on. If you begin the sculpting process with going into fine details right away, the sculpture will lack structure and life. The Clay, ClayTubes and Claybuildup are excellent brushes in Zbrush to use at this stage. They will allow you to build form up quickly without adding or worrying about details.
Once your primary shapes are working, it’s time to add smaller details, such as big wrinkles, more defined facial features and so on. When you finish this stage, the model should look the same as the final if viewed from a distance. In this Zbrush Sculpting Tutorial we take the White Walker only up to this stage.
Next stage would be the very fine details, which we aren’t doing in this video. This includes pores, small veins, tiny wrinkles and so on. They will help you sell the realism in the piece. Again, only do this level of details once everything else is working.