Alright, here's a re-creation of the other hologram that I linked to the G-code for. There's two versions, one that is made up of line-segments, and one that is made up using SVG's native cubic bezier curves.
I tried clear acrylic, it didn't work... I'm not sure if black acrylic would work better, or if it's the same. But I was using extruded acrylic as it wouldn't frost to white when engraved, and I don't have any extruded black handy.
