Abstract: A vertical blind has individual vertically extending vanes that include vertically extending interior compartments. The compartments are created by bonding a corrugated or pleated first member to a generally planar second member. In the first several embodiments, the members of each vane are formed of a relatively flexible, translucent sheet of material. A method of diffusing light through the translucent members of the vane and interior compartment is disclosed. In an alternate embodiment of the invention, the vertical vane is comprised of a relatively thick and rigid backing member wherein the thinner front member is bonded to the backing member to form the vertically extending interior compartments. In this embodiment, one vertical edge of the room-facing side of the vane is flattened, such that adjacent vanes are able to overlap.