The issue focused on whether or not light passes through an object. An example would be if you put a dollar bill on a table. When you shine light at it you see that it doesn't move through the object, but if you shine light at it from another angle you see it move. 
 
 My goal is to simply post this question on reddit for anyone who might have any insight into how this works. 
 
 **EDIT** **Thank you all for your comments, very interesting. I'm going to try to answer some more questions today so