It is a 3d model of the study room, created using a blender and pictures are taken by cycles render and all materials are added nicely.A single blend file will give you a room, windows, table, books, suitcase, door, computer, chair and many more...if you want to get elements individually you can see the zip file also
OBJ (OBJ, filesize: 136 MB), BLEND (Blender, filesize: 331 MB), FBX (Autodesk FBX, filesize: 136 MB)