This is a tutorial about using a multi-level EXR file, compositing it in Nuke. You can download a frame of the exr file here: http://www.joeraasch.com/render-passes/ My blog is here: joeraasch.com I teach compositing here: senecavfx.com
Right-click 'Download' and select 'Save Link As' if the file opens in a new tab.