Draw the sphere on the canvas and scale it to roughly the same size as the reference mesh. Expand the geometry rollout in the tool palette to reveal the DynaMesh options, as shown here:

DynaMesh options in the Tools rollout

We will start by keeping the resolution low and turning off the Project function, as this will slow us down as we use the tools to blockout the mesh. Hit the DynaMesh button and you will notice the mesh on screen has changed.

The low resolution DynaMesh settings

Now that we have the DynaMesh set up, we can use a handful of brushes to rough out the basic shape. Here, we will use the Move brush to rough out the torso mass. As you work, you will notice the mesh is becoming broken and faceted as the mesh is pulled and stretched. To bring back the resolution of the mesh, we will hold down the Shift key and then drag it in the open space on the canvas, allowing DynaMesh to recalculate the model evenly redistributing the polygons so we can continue working.

We will...