It’s the back in that what’s facing out to the audience would still be smooth flat acrylic - the engraving would be taken out of the back. It makes a really cool depth effect
Here’s a good post with examples
I live in Florida where there’s no snow. To fix that, I wrote and open sourced a snowflake generator that I’ve been using to 3D print unique snowflakes, available at https://www.thingiverse.com/thing:37525 . I just tried engraving them into Acrylic, and I really like how they came out.
To produce them I generated geometry in STL files, which you can do on Thingiverse using Customizer. There are also many generated available for download. Then I loaded the STL files into Meshlab, generated a dept…
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