I purchased 7 Vive units for our location however I was unaware that they could not be used in an open space so I have been working on ways to divide the play spaces without building walls. Has anyone had this problem and what did they do to fix? What materials work? Will cloth or plexiglass work? I read that the IR does not pass through glass or Plexiglas but has anyone actually tried it to be sure? Thanks for any help you can give!