大方廣佛華嚴經隨疏演義鈔 76.12

76.12

疏「兼於鏡像」者，以文云「雖現其中」，故通鏡像亦不通映質，映質之影無現中故。若取日照身影入於水中，則亦通之，然是水影中攝。

Regarding the commentary's "Also including the mirror image": because the text says "although appearing within it," it applies to the mirror image as well, but does not apply to the shadow cast by an archetype, because the shadow cast by an archetype has no appearance within anything. If one takes the shadow of a person's body cast by the sun entering the water, it would also apply, but it is subsumed under the reflection in water.