I understand you. However, if we are going to talk about ethnic identity based on Egyptian art, then it must be accepted that you are dealing with generalizations. This is one tomb and there are many others from the Old Kingdom onward that also have the same style from the Western Oases. The point being that all Egyptian art is generalized and often used cookie cutter templates for the many various peoples that they were familiar with. Trying to take that data and turn it into a definitive statement on the appearance of any given population is almost impossible. The point I am making is that all people to the West of Egypt were not depicted as lighter skinned whether they were Egyptians or not. It does not answer the specific question implied here as to how widespread populations similar to the portraits of the Libyans were to the West of Egypt. Egyptian artwork is too generalized to give anyone enough data to say anything definitive one way or the other. I don't disagree that the generalization is sufficient to identify that such people existed to the West, but there is a large amount of land to the West and South of Egypt and it isn't clear how many of the people in these areas were accurately represented by such portraits from that time.