Applying Anti-Aliasing Using PrusaSlicer

A lens I 3D printed which corrects for my eye prescription of -1

I recently acquired a DLP 3D printer, which uses liquid resin that cures into a solid under UV light. The resolution is much better than a traditional FDM printer, and can even enable the 3D printing of lenses.

These printers deposit a layer of material at a time, using an LCD screen to block or pass the UV light. Large, solid objects can be built up from many layers.

How a DLP/LCD resin 3D printer works. Source

Because each layer is built up one by one, there are also very distinct layer lines which can make the surface jagged-looking, which is not great for most applications.

Layer lines on the surface of a 3D print. Source

By using the pixels on the screen to generate grey pixels in addition to fully on-off pixels, we can make a slightly nicer surface via anti-aliasing

In PrusaSlicer, this option is called “Printer gamma correction”, and is specified as a parameter from 0.0–1.0.