Wrong shadows with Cycles Renderer I've tried to preview my final render, however I've noticed that the shadows are casted incorrectly. The problem isn't the positioning. Moving the lights doesn't affect shadows and only makes already illuminated areas brighter if the light source is near them. But even if I put the point light in front of the face, the shadows aren't modified at all.
I've tried strenghtening the light and changing its size, however the shadows are still wrong.

Is there any step I've missed? How can I fix this?
Incomplete node setup

Normal maps need a conversion  before you feed them to the shaders. The black spots you are experiencing are not shadows, but an incorrect calculation of the surfaces normals.

A Normal Map node must be added between the texture and the shader.

As said in the manual:


  The Normal Map node generates a perturbed normal from an RGB normal
  map image. This is usually chained with an Image Texture node in the
  color input, to specify the normal map image.