you can use a photo of a bedroom, put it on a backdrop, then position your characters in front of it.

If you need to position your characters INSIDE the bedroom (with some furniture in front of them) then use two identical photos of the bedroom, but edit one of them so that everything but the foreground furniture is transparent.

Put both images on backdrops and separate the backdrops so there's space between them. Put your character between the backdrops

align the camera and size the backdrops so the two images merge together into the same visual space... you'll be bale to see your character through the transparent part of the foreground image, and it will look like he/she is standing between elements of furniture in the same bedroom

Unless you need to pan the camera during the shot, this is a very quick way to accomplish what you want.

However, if panning is required, then you need a 3d room full of 3d objects

Every scene in my 20 second contest entry is done this way.

There's a children's bedroom in Muvizu, but if you want an adult one you'll probably find it easiest to build it yourself with the Muvizu assets.
edited by MrDrWho13 on 03/08/2016