Occludes light cast by a Light2D, casting shadows. Occludes light cast by a Light2D, casting shadows. The LightOccluder2D must be provided with an [OccluderPolygon2D] in order for the shadow to be computed. $DOCS_URL/tutorials/2d/2d_lights_and_shadows.html The [OccluderPolygon2D] used to compute the shadow. The LightOccluder2D's occluder light mask. The LightOccluder2D will cast shadows only from Light2D(s) that have the same light mask(s). If enabled, the occluder will be part of a real-time generated signed distance field that can be used in custom shaders.