IMG_7743. Oil in water effects. Here is what you need, cooking oil, water, glass bowl, various sheets of coloured card. Place the coloured card on the floor in any order, suspend the glass bowl about 2 or 3 feet above the floor (Fortunately I have a glass table) fill the bowl with water and add a spoon full of cooking oil. The white dots are the reflections of the ceilings spot lights. A macro lens is ideal but a short focus lens of any kind would do, 50mm, 85mm or stand on a chair or steps to get the height. (Get someone to steady you if needed.