OriginalRes/ArtProject/Assets/Thirdpaty/Live2D/Cubism/Samples/Masking/Description.md

Masking

Masking is automatically set up for Cubism models that use masks on import (and whenever you manually call CubismModel3Json.ToModel()).

By default, however, all models share the same global GPU buffer for intermediate mask data (CubismMaskTexture.GlobalMaskTexture). If you're models use more masks than fit into that buffer, be sure to either adjust the buffer, or assign custom buffers to your models via CubismMaskController.MaskTexture.

The quad on the scene shows the layout of the masks in the GPU buffer.