GraphicsTexture that represents the texture resource uploaded to the graphics device (Read Only).
This returns the current GraphicsTexture object corresponding to the Texture.
For RenderTextures, this returns the GraphicsTexture object that represents the color buffer. If the RenderTexture is depth-only and has a GraphicsFormat of None, this returns the GraphicsTexture object representing the depth buffer.
Note: When you use the Unity APIs to reinitialize the properties of a Texture object, or when a different mipmap level is streamed in, it changes the underlying GraphicsTexture object. Rather than caching the value, get Texture.graphicsTexture again to retrieve the new GraphicsTexture.