Clear embossed Acrylic Sheets question

I was at a LSS store a few days ago and picked up a sheet of clear embossed acrylic 12X12 Sheet. There was an entire endcap of various patterns. I wanted to search You tube and Pinterest for some examples of how to use them, but I can't seem to find them, or remember what brand they were, Does anyone know what I'm talking about or have any links for ideas, or suggestions?

Thanks friends!! :-)