Mouth

The mouth texture is part of the Mask texture.

In Modulation

In Color Modulation, the mouth uses the Rgb Layered strategy. The eye consists of three different colors: The red bottom lip channel, the green upper lip channel, and the unused (?) blue channel.

<<insert gallery showing R and RG textures>>

In FFL, these colors come from the Mouth Color Tables. In nn::mii, these come from the Common Color Table and the Upper Lip Color Table.