multimaterial support, "preset"

each preset contains visibility, flags and material

src/core/render/renderer_base.cpp

@@ -247,7 +247,7 @@ void RendererBase::reloadLightsParameters(const QMap<int, QList<Light *>> & ligh
 		so.decay_intensity[2] = l->decay_quadratic;
 		so.decay_intensity[3] = l->intensity;
 		so.size               = l->size;
-		so.flags              = l->cast_shadow ? 1 : 0;
+		so.flags              = l->isCastShadows() ? 1 : 0;
 		if (l->light_type == Light::Cone) l->light_map.copyToQGLMap(so.map);
 	}
 	buffer_lights.bind(view);