My girlfriend was really curious about how well the glowforge handled grayscale engraving, so we wanted to try to see if we could get everything into one file and how that would work out. Can it do vector and raster in one file? Turns out it works great!
Here is the original drawing she made that I took a photo of and pulled into illustrator
I applied a compound masking path to it and copied the path to serve as the cut line to give it a bit of a border
I saved it as an SVG, imported it to the GF UI and it engraved the drawing in greyscale mode as it would if you imported an image otherwise, and then cut it out. No hitches.
Heres the final result: