¿El objeto emite sombras?
ShadowCastingMode enum defines how and if shadows are cast from this object.
Typically shadows are either cast or not, but it's also possible to make shadows two-sided
(useful for otherwise single-sided geometry) or make a shadows-only object (that is
otherwise invisible in the scene, but casts a shadow).
See Also: ShadowCastingMode, receiveShadows, Light.shadows.