Node used for displaying a [Mesh] in 2D. A [MeshInstance2D] can be automatically created from an existing [Sprite] via a tool in the editor toolbar. Select the [Sprite] node, then choose [b]Sprite > Convert to MeshInstance2D[/b] at the top of the 2D editor viewport.
The normal map that will be used if using the default [CanvasItemMaterial].
[b]Note:[/b] Godot expects the normal map to use X+, Y+, and Z+ coordinates. See [url=http://wiki.polycount.com/wiki/Normal_Map_Technical_Details#Common_Swizzle_Coordinates]this page[/url] for a comparison of normal map coordinates expected by popular engines.