TINTTAB is a WAD lump in Heretic and Hexen (it also appears in Strife as XLATAB) for supporting translucency in objects (supplanting the partial invisibility effect used in Doom and Doom II). It is a precalculated lookup table similar to COLORMAP, but maps each color against each other color, rather than against specific levels. It is 65535 bytes (256×256) and determines what each color changes to when shown behind a translucent pixel of another color. Due to the limitation of 256 colors shown on screen at once, it is only an approximation in most cases.