You make natural terrain in a 150-foot cube in range look, sound, and smell like some other sort of natural terrain. Thus, open fields or a road can be made to resemble a swamp, hill, crevasse, or some other difficult or impassable terrain. A pond can be made to seem like a grassy meadow, a precipice like a gentle slope, or a rock-strewn gully like a wide and smooth road. Manufactured structures, equipment, and creatures within the area aren't changed in appearance.

The tactile characteristics of the terrain are unchanged so physical interaction can reveal the terrain to be an illusion (such as if it feels strange or if the object is not there and things can pass through it). A creature that suspects the terrain to be an illusion (such as by seeing a thing pass through it) can use an action to make an Intelligence saving throw, determining that it is an illusion on a success. If a creature discerns the illusion for what it is, the illusion becomes faint to the creature for the rest of the duration.