Hello, I was checking this great tutorial on composition in Cycles by Bartek Skorupa:
http://cgcookie.com/blender/2012/12/10/compositing-cycles-render-passes-blender/
…where he mentions storing the split passes into OpenEXR files. When he inputs them back, a “depth” socket shows up, and he briefly shows (see attached image) that it indeed contains a depth pass.
I seem to only be able to obtain a completely white channel in there from my own renders. Am I missing some file output option or whatever?