You exported an image from Lightburn using grayscale huh. Can’t do that lol. Enjoy reading this journey: Laser Pause While Changing Power
Anyways, literally just this morning I “finished” fixing that bug if you want to help test it. No guarantees it doesn’t break anything. If you want, PM me and I’ll walk you through what needs to be done.
Otherwise you’ll have to use dithering or half-toning. Can’t grayscale with the stock firmware. It stops and starts after every single line of code, which is why it’s taking so freaking long.