Okay, some of these Questions are not asked all that frequently - but - perhaps they should be... to ask a new question ›contact me
yes, i can.
when an image was created with a computer that is very easily done.
because, typically, it will have layers - each one of those layers can be modified and new layers can be added, efficiently and quickly (i.e. it does not have to cost much).
digital photographic images are easy modify, as well - by retouching, mixing, filtering, adding layers etc. if the photograph was taken in RAW format (all session photos are) a great deal of detail, especially in shadows, can be brought out in post-production.