Full nude is as the name implies where the model is fully nude, and breast and genetalia can be seen/glimpsed. For some models there is a difference between full frontal nudity and images shot a bit more from the side, but in short the full body will be visible. Lighting and mood is everything with this style as a very fine line separates sensual images, which I prefer, from vulgar images. Lighting means a lot as does the models expression and sorroundings. Certain 'art' magazines such as S-magazine, 'Treats Magazine’ ‘Volo' as well a Photo- coffetable books is where one typically find these images.
The models that fall in this category are the ones I prefer to work with as it gives the largest amount of flexibility when shooting.