We carry Black and White Truss Covers available for rent.  Black truss covers are used mostly for masking.  White truss covers can be used for light diffusion for a decorative "warming" effect.  We offer covers that are tube-style that have no openings, or with vecro sides that provide access to lighting and equipment inside. We also have end caps available.
 
Product Specs:
Size: For use with 12" box truss
Length: 10'L, 15'L, 20'L
Style: Tube or velcro