Compositing is referred to be as trickery because it is often used to create illusion which tends to depict that all features are segments of the same visual. The process starts with the computer generated effects entirely depending on the nature of the product.
Then color is adjusted in every pixel of the image just to portray the plausibility of the visual. Background is projected that goes with the theme of the product and finally motion tracking which captures the movement of objects in an exact precise manner.