Covering for architectural features, and related systems, methods of operation, and manufacture

A method of forming a flexible panel for a window covering, the flexible panel having a height and a width and being configured for adjusting the amount of light that passes therethrough, the method comprising:

• manipulating a plurality of sheets of material so that each sheet of material bends back on itself and two end portions of each sheet of material are adjacent each other, each sheet of material having a first light transmissivity;
• ultrasonic welding the two end portions of each of the plurality of sheets of material so that each of the plurality of ultrasonically welded sheets of material forms an independent cellular vane having at least two layers;
• adhesively bonding an outer surface of a first layer of the at least two layers of each independent cellular vane to a first vertical member;
• and
• adhesively bonding an outer surface of a second layer of the at least two layers of each independent cellular vane to a second vertical member,
• wherein at least one of the first vertical support member or the second vertical support member has a second light transmissivity that differs from the first light transmissivity.