Is modifying the lighting in a photograph to obscure the facial features (of a Niqabi woman) considered among the forbidden types of photography?

There is no harm in adjusting the lighting of photos and the like, and this is not among the prohibited types of photography. The prohibition of photo manipulation with software is restricted to altering the physical appearance of the person photographed, and does not include adjusting lighting. Incomplete images, such as a photo of only the face, are not included in the forbidden manipulation.