Expert level in 2D means feel and pixels are measured, not eyeballed: a jump has a height in tiles and a coyote window in ticks, a camera has a lag in pixels, a pixel-art screen has an integer factor ...

Open-source technical reference covering orthographic character sheets, clean monochrome line art extraction, 2-head chibi proportions, 2:1 isometric tiles, 3D turnaround blueprints, typography ...