Opti-Myst’s revolutionary technology uses water vapor to reflect light particles. This creates the breathtaking flame and smoke effect. Change the look of your Dimplex Opti-Myst Pro 1000 Built-In Fireplace by simply adding optional realistic log set. it instantly changes the look of your fireplace from contemporary to traditional. The log set is hand finished and painted to expertly replicate real burnt wood. Enhance your complete sensory experience with the sound of natural wood fire as the flames dance in front of your eyes.