Upon observing an active illusion, a person can make a Mind roll, difficulty 7. If their Outcome is greater than the Outcome on your initial roll, they realize they are viewing an illusion, though it will still be visible to them for the duration. If they investigate the illusion and notice it is non-corporeal or otherwise behaves in a bizarre manner, they conclude it is an illusion without a roll.

An illusion can show any image that fits the size restriction, but it cannot have moving parts, cannot create a direct replica of an existing living being, and it may only affect a person's sense of sight, not hearing, smell, taste, touch, or other senses.

Illusions cannot be used as attacks. For example, you cannot create an illusion of the sun to blind people.