Chunky graphics refers to a pixel storage format where each pixel is represented by a single byte or word containing its color index or RGB value, as opposed to the Amiga's native planar format where bits are spread across separate bitplanes. This format is more efficient for CPU-based graphics operations and is standard on PC systems and modern graphics hardware. On classic Amigas, chunky data must be converted to planar format using a Chunky to Planar (C2P) routine before display, unless using a Retargetable Graphics (RTG) card that accepts chunky data directly.