In the early 2000s, the video game industry was locked in an expensive, desperate arms race toward absolute photorealism. Studios pushed hardware to its limits to render realistic faces and lighting. Yet, twenty years later, those "realistic" games look horrifyingly outdated, blocky, and ugly. Meanwhile, a niche game about rollerblading graffiti artists looks just as vibrant and stunning today as it did on release. Rendered in Ink tells the technical and artistic history of "Jet Set Radio" and the birth of Cel-Shading in 3D video games. By completely ignoring photorealism and instead programming the lighting engine to flatten textures and draw thick, comic-book-style black outlines around 3D models, developers achieved a timeless aesthetic. The book explores the grueling mathematics of non-photorealistic rendering. It breaks down how manipulating the render pipeline to intentionally limit color palettes and shadow gradients created an art style that completely insulated the game from the relentless, brutal aging process of graphics technology. Discover the triumph of style over processing power. This deep dive into rendering history proves that in digital art, pursuing perfection is a trap, while embracing a distinct artistic abstraction leads to immortality.