If I wanted to illustrate something such as the proper procedure for operating a machine -- where the machine itself is the primary point of the illustration, and not the human model who is using the machine -- then why not use Posette or Dork as the human mannequin?  If I were to use a fetching V4 character for the mannequin, even if she's dressed in conservative 'everyday' clothing: her presence in the picture could actually distract from the central point of the illustration.  In cases where the desired emphasis of an illustration is to be  focused on an inorganic object, then you want the observer to be looking at the machine: and not to be distracted by looking at the girl who is operating the machine.

It's the inverse of the reason why stage magicians use attractive women as their assistants.  The magician wants you to be looking at the girl -- and not at what the machine behind her is doing.

When it comes to "scientific" illustrations -- Posette and Dork can do such a task just fine.  In fact, they might actually do the job better than their more realistic 3D cousins.

On the other hand, if the main point of an illustration is to be the human in the image, and not a machine or some other inorganic item such as a building or a piece of furniture -- then in those cases there isn't any question that V4 or M3 will do the job better than the default Posette or Dork figures can.  So it's Posette and Dork for directions about operating an electron microscope or instructions about pushing a lawn mower -- and it's V4 or M3 for modeling clothing, or for looking pretty / handsome.

Something To Do At 3:00AM