Smooth-Maximum, the most useful function

Inigo Quilez, the graphics programmer behind Shadertoy and much of the signed-distance-field modeling toolkit, explains the smooth maximum (and its twin, smooth minimum) and why blending two shapes or values with it is so useful. The video is a short, math-driven walkthrough aimed at people who write shaders and procedural graphics.

HN users submit it as a quick, high-quality explainer from a respected graphics author.