Problem with photomontage - background versus crib

[adrianna]

Hi. I am a beginner in photoshop so please for your understanding. I would like to make a satisfactory photomontage to the advertising, but I have a problem with the background (not realistic looks) and problem with cot paste into the background. How to make crib naturally looked at this background. Until now I used gaussian filter but do not know how to do the rest. Please help me


How make the better background? I looking for prepared background, but I do not founded.

[colleague]

you can make the illusion of a wall and a floor by making a part of the background a little darker
and it needs a little bit of shadow from the crib