Creating 3D environment From A 2D photo

Hi there,

I'm looking to do something that used to be very simple in Photoshop but now that they've discontinued the 3D tools, I can't figure out how to do it.

I want to create a 3D perspective out of a photograph of a bedroom. Ultimately I'd like to take another photo and map it onto the walls/ceiling/floor of that room to make that image feel like it's covering the planes of the initial room.

In Photoshop I would have used Vanishing Point to create the perspective and then just cut and paste the image into it to map it onto the planes but that's not working. Is there a way to do this in Dimension? Or Stager? Can't figure it out.