How to make invisible enemies visible in mirrors?

Iโ€™m making a survival game where you have to survive some time. The enemies are invisible but audible, and you are not invisible. If anyone knows how to fix that, please help me :smiley:
any help is appreciated :slight_smile:

If the reflection is generated based on a second camera, it can be done in a very simple way.

Hide the enemy by putting it on another layer, then hide that layer from the main camera while making it visible in the reflected cameraโ€™s rendering settings.