This was just burning the backing off, image reversed, at 1200mm/min, 80% pow, 30(7)watt NEJE laser.
It ablated the glass as it burned the backing, leaving a frosted finish. Zooming in you can see the stair-stepping on the shapes. I think I need to adjust my line interval a bit. This was at .1mm. This was just an quick test with an easy shape I had from when I made some slate coasters, I’m actually more of a VW fan
Here’s another one. Kinda reminds me of those framed mirrors you win at an amusement park for getting a ring around a bottle. Maybe the next one will be Led Zeppelin related.