A year ago, it was said that this was impossible. Has this changed at all, by chance?
It would be nice to not have the smoke perpetually blowing across what I just engraved. It isn’t so much a problem with most masked materials, though it would make it easier to clean up the residues from the finished piece. It definitely presents a problem when working on 2-color acrylic sheets, like the ones from Inventables, as the top color gets blasted off, but the hot dust from each new line redeposits on the still-warm core from the lines before, sometimes actually fusing back into the material.
If the laser drew the image from the top down, the dust/smoke would blow across untouched (and probably masked) areas, with much less depositing and would probably just get obliterated by the laser passes anyway, which would make the final cleanups a hell of a lot easier and effective.
It’s a feature that lots of other lasers advertise, and seems like something that could be done, since it’s an operational issue, not a physical/hardware issue.