Mip bias
A tunable offset that nudges which mipmap level the GPU samples — negative for sharper, aliasing-prone textures, positive for blurrier, cheaper ones.
When sampling a texture the hardware picks a mip level from how much the texture is minified on screen. A mip bias (also "LOD bias") shifts that choice: a negative bias forces a higher-resolution level than strictly correct, trading extra aliasing and bandwidth for crispness; a positive bias does the reverse, often as a quick performance or memory lever.
It matters most with upscalers. DLSS, FSR and TAA reconstruct detail from a lower-resolution render and explicitly require a negative mip bias — roughly log2 of the scale factor — so textures aren't blurred twice. Get the bias wrong under an upscaler and the whole image reads soft.