This 3D hand example has a skin material on it that looks extremely realistic. At points parts of the skin look a little too shiny, but the nails, the veins, and the folds in the palm and the knuckles are convincing. It shows the polygons underneath the skin which are surprisingly simple. I couldn't find what program the model was made in. The fingers look a little too bulgy from the final view, and when the fingers move they don't realistically bring other fingers slightly with them, but the material and texture of the model is worth noting.