Here is what the extra 32 pixels unlock:

The transition from 32 to 64 pixels in height is not merely a numerical upgrade; it is a liberation of anatomical detail. The standard "Steve" model offered a single layer of texture. The 64x64 "Alex" model introduced a second, transparent "overlay" layer, effectively doubling the canvas. This extra resolution allows skin artists to move beyond flat, painted-on shirts and pants. With 64x64, one can render 3D sleeves, rolled-up cuffs, detached jacket tails, and even volumetric hair that casts subtle shadows over the eyes. Extra quality here means utilizing every pixel of that overlay to create depth—ensuring that a character’s armor feels worn, their hoodie has a functional drawstring, and their boots have distinct soles that appear when they leap.