Different materials create very different kinds of smoke. Birch effects can feel dry, leathery and tar-like, while guaiac wood can suggest burning leaves, tobacco or dark wood. Resins such as styrax and Peru balsam can introduce sweeter balsamic warmth, preventing the accord from feeling simply burnt or ashy. Tobacco can add dry leafiness, and leather can strengthen the darker side.
Smoky accords also respond strongly to surrounding notes. Vanilla or gourmand materials can create the impression of toasted sweetness, woods can make the smoke feel more natural and dry, and resins can turn it towards incense. This is why smokiness can appear in very different perfumes without every one smelling like a bonfire.