I have had this many times and the cure was to select image then adjust image. Here you can adjust the image until the background is no longer visible. Changing contrast and trying different modes also helps. Your power/speed settings are a lot higher than I use. Try a faster speed which will also reduce the burn of the background. These were done at 1200mm/m 80% on my machine. Just done these - Finished Creations - LightBurn Software Forum
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