In this video I use image planes in Houdini to pull out data from a shader, which in this case is occlusion information. I discuss how we're going to do it and why the supplied occlusion VOP that ships with Houdini 9.5 isn't what we want.

The large resolution videos and any support files can be downloaded on my website (www.geneome.net). I created a nice Occlusion digital asset after I made this video, so that might be worth checking out.