Usually, a professional photo editing job is distinguished from an amateur work already at the first glance. Sometimes, on the contrary, a technically scarce job can be, yes, recognized, but it continues to escape what is the element that unmasks it. There is, how to say, a “I do not know what” that makes us say that a job has not been done properly. In fact, as in many other cases, the devil is in the details. Let’s see some examples:

technical errors – a slightly hasty arrangement can keep elements of the old background that disturb the whole, for example between the model’s hair or in the branches of the trees;

errors in light – a photomontage may appear “strange” because the objects juxtaposed come from photographs in which the light hit them from different angles, so one object will have, for example, the shadow to the right and the other object to the bottom;

errors in filters – when several objects are brought together, you have to neutralize their basic filters to make all the elements homogeneous. If this aspect is not taken care of, some elements will seem warm, others cold, others “vintage” etc .;
errors in sharpness – another way to create a bad image is to not consider the characteristics of sharpness and definition of the various elements.