The Streaming Controller component is part of the Mipmap Streaming system. You do not need to use this component when the Add All Cameras setting in Quality settings (Edit > Project Settings > Quality) is enabled. Add All Cameras is enabled by default. Use the Streaming Controller component to trigger mipmap streaming for a Camera in your scene when the Add All Cameras setting is disabled. For more details on how to set-up and use the Streaming Controller component, see Mipmap Streaming API.
|Mip Map Bias||Use this setting to force Unity to load a smaller or larger mipmap level than the one that the Mipmap Streaming system has automatically chosen. Enter a value in this field to set the offset that Unity applies to this mipmap level. Unity adds this offset to all the mipmaps assigned to Textures that are in the Camera’s view.
For example, if Unity loads a texture at mip 1 and the Mip Map Bias is set to 1, this means it will load mip 2 instead.
To control this setting using the API, use StreamingController.streamingMipmapBias.