In P4, I did one of a young Henry XIII using any available pictures I could find. However, I made sure those pictures were sized exactly the same (eyes & mouth) using a paint program. Then, I tried to get the figure to overlap exactly using the Outline function and a camera that fit that angle. I would switch back & forth between cameras and Outline (cntl+2)/Full render (cntl+9) to ensure the face followed the contours as closely as possible. The model initially had NO texture. I wanted the shape to be realistic without coloring first. Then I found a texture that was relatively close (from PoserStyle).