Single Point Pre Production

In my single point shots I hope to accomplish three types of portraits. The first one I hope to accomplish is a butterfly portrait. The way that I will accomplish this is by using a low ISO of about 100. I will use a medium shutter speed so nothing is under exposed or over exposed. I will place the light under my subject so everything becomes lit and is evenly exposed. The next type of picture I hope to accomplish is a loop portrait. The way I will take this picture is to use the same camera settings I just need to move the light to expose on side of the face. It will be farther away so one side is not completely black but is a little darker than the other. The third picture I hope to accomplish is a Rembrandt portrait. I hope to accomplish this by using the same camera settings. I will move the light to one side but put it far from the subject so everything is evenly exposed but dark. To accomplish my last photo, the split I will put the light close to my subject this will make the effect of half of the face disappearing. I will also use the same camera settings. This is how I hope to accomplish my photos.