Drawing a pixel-art cube

Pixel art is fun, and isometric pixel art looks great when done properly. My friend Rex informs me that, unlike “real” isometric art which uses an angle of \(30^\circ\) (\(\pi/6\) radians), pixel isometric art uses a ratio of two-pixels-along-per-pixel-up, which is a slightly lower angle. Rex then wanted to know how high (in pixels) he should draw the edge of a cube if he’s already drawn it some number of pixels wide. Here is the answer.

→ Drawing a pixel-art cube

(tl;dr: Multiply by 0.8944.)