Chameleon Cast Walls System of Brookline, Mass., has licenses companies to produce a “thin block veneer” for cast concrete wall panels. By casting the Chameleon units into the face of the walls, the tilt-up contractor can achieve the look of genuine architectural masonry or stone. The units are economically produced on standard block equipment. Installation of the veneer fits into the tilt crew’s normal procedures using existing workers. The development is striking to many in the block industry who have labored to find ways to compete with tilt-up.