AverageBlending
From polycount
When using texture blending, average is when the colors of the base map and the light map are blended together evenly. This helps when you don't want the light map to brighten or darken the base map, like when you are placing a decal of a crack on a wall to make it looked cracked. See also additive blending, average transparency, invert blending, subtractive blending.
