Why Resin Printers See What FDM Printers Simply Cannot

Hold two objects in your hands.

The first came off an FDM printer — a well-tuned machine, carefully calibrated, running quality filament at 0.1mm layer height. Run your fingernail lightly across the surface and you feel it: the horizontal lines, faint but unmistakable, stacked like the rings of a cut tree trunk. The detail is there. The object is impressive. But the fingerprint of the process is visible in the texture.

The second came off a resin printer running at 0.03mm layer height on a 12K MSLA screen. Run your...