Version: 2020.2

QualitySettings.streamingMipmapsMaxLevelReduction

マニュアルに切り替える
public static int streamingMipmapsMaxLevelReduction ;

説明

The maximum number of mipmap levels to discard for each texture.

This is also used as the number of mipmaps to discard when first loaded before texture streaming begins to bring in the desired mipmap levels based on camera calculations.