Hi, Everyone~

I'm following a tutorial at http://www.thearchitectureacademy.com/fe/51734-tutorial-simple-lounge-room. It is from Andrew Price of Blenderguru.com. In the video, at approx. 13:10, he sets the background image, an HDRI file, using the "surface" tab in the "world" setting (see image).

The next image is my "world" panel, which has no "surface" tab in the "world" view. Searched the add-ons, Blender wiki for info and I am not having any luck locating this surface tab.I even went so far as downloading 2.67 again to see if possibly the "b" version wouls have this feature. I have checked it in both Edit and Object mode and also checkefd in all the objects in the scene. I have quite a bit of trouble with Andrew and his tutorials because of his accent and the fact that he talks way too fast for an old man like me. I am sure I am just overlooking some vital aspect of this, but will be damned if I can figure it out. I've been at it most of the day and the only progress is a terrific headache. Any help much appreciated!

TIA

C~