To mask an image every editor has to be very imaginative. Failing which the final result can be ‘unmasked’ and the image rendered non-usable. Choose a non-destructive way that provides flexibility to make the image better.
There are two kinds of processing a digital picture. One is the destructive way and the other is the non-destructive way. In the former way, the original essence of the composition is likely to change. In the later, there are no chances of any skewed ratios. And this is a much better way of editing the picture. This also keeps the clients happy with the results. In the non-destructive category, there are also chances of scalability and improvement to the original texture of the image.