super twins :-)

thanks for comments

...but it is obvious that the two images on the RHS have been layered in. It is obvious because there is no shadow on the carpet. You could add this with the burn tool or better still, create a drop shadow from the blending options of each mask you have created. It works really well. Cheers! RickDB

Rick: you are right, but partially. The image was layered, but child was not isolated from white background... all of them were taken from tripod in the room you can see on the photo. So, shadows are natural (except the child on the first plane).