Easily make optical patterns with gradations, perspective, and other variations using the replica (live copy) feature of SymmetryWorks. Create an illusion of movement, experiment with lines and geometric elements, moires and progressions. SymmetryWorks helps you with composition by taking care of all symmetrical arrangements and letting you use nontrivial repeats. So experimenting is easy and fun. Many features in Version 4 are especially useful for creating optical patterns and op art.