BitmapTextureCache DEPRECRATED along with BitmapMaterial.
 CubeReflectionTexture CubeReflectionTexture provides a cube map texture for real-time reflections, used for any method that uses environment maps, such as EnvMapMethod.
 PlanarReflectionTexture PlanarReflectionTexture is a Texture that can be used for material-based planar reflections, as provided by PlanarReflectionMethod, FresnelPlanarReflectionMethod.
 SpecularBitmapTexture A convenience texture that encodes a specular map in the red channel, and the gloss map in the green channel, as expected by BasicSpecularMapMethod