Cache of the default Canvas Ericsson Texture Compression 1 (ETC1) and alpha Material.
Stores the ETC1 supported Canvas Material that is returned from GetETC1SupportedCanvasMaterial().
Note: Always specify the UI/DefaultETC1 Shader in the Always Included Shader list, to use the ETC1 and alpha Material.
See Also: Canvas.GetETC1SupportedCanvasMaterial.