Painted Acrylic!

Shout out to Sean Murray, this works well. Black spray paint on acrylic.
80w, speed 100mms, 18% on top 12% on bottom.200 dpi.

How do you set different power levels for top and bottom?

Min / Max settings don’t do anything for dithering - you’re getting 18% for the entire image, because dithering is just on/off.

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With that method, what does the result look like if it’s back lit, rather than edge lit?

Would probably work nicely on glass as well, I’ll do a test as soon as I moved my laser to the workshop.

Had no idea, which image setting gives most detail?

Probably Jarvis or plain dither.