Bridget Riley later produced works in full color (though she does not herself execute the works that she conceives of^{[citation needed]}), and other Op artists have worked in color as well, although these works tend to be less well known. Josef Albers taught the two primary practitioners of the "Color Function" school at Yale in the 1950s: Richard Anuszkiewicz and Julian Stanczak. Often, colorist work is dominated by the same concerns of figure-ground movement, but they have the added element of contrasting colors which have different effects on the eye. Anuszkiewicz is a good example of this type of painting. In his "temple" paintings, for instance, the juxtaposition of two highly contrasting colors provokes a sense of depth in illusionistic three-dimensional space so that it appears as if the architectural shape is invading the viewer's space.