When cast, the caster was able to both see an illusion and know it was an illusion. Individuals around the illusion would see it if the caster made physical contact with the illusion while the spell was in effect.
In addition to verbal and somatic components, the spell required a material component, a piece of either crystal, glass or mica. Whichever component was chosen, it had to be tinted with a yellow dye.
- Detect Illusion (spell) article at the Baldur's Gate Wiki, a wiki for the Baldur's Gate games.
- Detect Illusion (spell) article at the Icewind Dale Wiki, a wiki for the Icewind Dale game.