It depends on the magic. I've heard of some that could do scents, textures....everything.

[ But she's never encountered one in person, which is the problem. It was never that relevant for her training, or her duties to the Earthen Ring. Illusions fall into the realms of arcane magic, or the domain of hated warlocks.

Kettara shakes herself. ]

Hallucinations have a cause. A poison, maybe.