A lot depends on whether your subject is the model herself, or if she is to enhance another subject. There is a difference. Proper lighting is always a concern. Professional models understand this and they know how to pose. Too many subjects look directly at the camera. I much prefer when they look at about a 45 degree angle, providing it enhances their beauty. I loved the Filipinas who would pose anyway I wanted them to. They didn't care about being naked or not. Most Thais are too shy being photographed naked. I didn't want pornography, but I did enjoy different lighting on a naked subject.