The challenge is just to download the files and show how well you can light and render the scene. You can use any software you want. It can be any location, lighting situation, time, mood, or style of image.
Most of the objects in the .obj file will need some subdivision (polygon smoothing) before you render. All shading and rendering techniques are fine. The rules are to have fun, make a cool rendering, and share how you did it afterwards. (If you want more detailed rules, see this thread .) Here's a screenshot of the scene:
Those bottles need your shaders and lights - can you help them?