Hi,
Here is something quite different from my previous post. I wanted to get a result as photorealistic as possible to enforce the message. I could have integrated something to get out from the "Shot like" and to shift from reality as this could indeed be achieved simply by shootting such a scene but I finally decided to focus on the content.
The scene was modelled with Blender
The light is an HDRI image
Rendered with Indigo 1.08
The hands have been posed with Daz3D, exported in OBJ format, then imported in Blender and adjusted to the piano keys using mesh modelling.
As the skin texture was not in a satisfying resolution for the foreground arm, I shot the part between the cuff and the cloth from a real arm and used it as texture for that part.
Here is a screen shot of the scene: