@squeakyears @sandofsky oh oh oh .. cool I get it . I noticed what I thought were weird effects with some of my sunglasses when looking at certain cars back windows… like the reflection was all “line-y”. Ah so what was seeing was the polarization cutting out some of the reflection. It’s the kind of thing where you put your glasses up and down seeing the difference but wondering about while you are in traffic but then forget to look it up later.. thank you!!!!!