The total amount of Texture memory that Unity would use if it loads all Textures at mipmap level 0.
This is a theoretical value that does not take into account any input from the streaming system or any other input, for example when you set the`Texture2D.requestedMipmapLevel` manually.
To see a Texture memory value that takes inputs into account, use `desiredTextureMemory`.
`totalTextureMemory` only includes instances of Texture2D and CubeMap Textures. It does not include any other Texture types, or 2D and CubeMap Textures that Unity creates internally.