Micro-Texture & Grain: Rather than large, retro video game blocks, this effect applies a extremely fine, high-density micro-pixel grid/dithered texture across the image.

Skin Detail & Grittiness: Look closely at the cheek, nose, forehead, and shoulder in the 1st photo—you can see a sharp, fine grid-like noise pattern. It gives the portrait a raw, textured, ultra-sharp film/digital display look rather than air washed, smooth skin.