This room is based on one I found in Houzz.com.
I custom-made the textures for the "solar system" ceiling and bedspread, "constellation" bottom sheet and pillowcases,"blast off" pillow and large spaceship over the bed in Inkscape. The wood and carpet textures are from CGtextures, and the other artwork on the wall is from Creativity103.com and Openclipart.org.
"Choppers" the T-Rex and the knapsack were my first serious attempt at soft-body modelling. The camera was set with a focal length of 24mm to be able to get in a good chunk of the ceiling without tilting the camera. Lighting is a basic three-point with the dresser and ceiling lamps done using the IES addon. This was originally submitted for the archi-viz contest, but someone pointed out there was a seam visible. I didn't have time to re-touch it for the contest, and decided to re-post the repaired image.