AlvinofDiaspar
Moderator
I thought it was just my camera that created these circular and orange circular lines. I guess I need to learn more about light, glass and refraction and reflection.
It's moire from the frit:
![en.wikipedia.org](https://upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Moir%C3%A9_pattern.svg/1200px-Moir%C3%A9_pattern.svg.png)
Moiré pattern - Wikipedia
AoD