The needle optimization technique is being further developed to provide a synthesis of optical coatings with layers of more than two materials. In the new version of OptiLayer, optimal layer materials are found automatically. Designing of coatings intended for wide angle of incidence ranges is possible. Several examples demonstrate an application of the needle optimization technique to complicated design problems© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.