does the counter-assumption have anything to do with the double-slit experiment - that light can act as a wave or particle? if so, is there any work accounting for this assumption or is it unnecessary/irrelevant?
@kbiesiadecki141: Yes, the double-slit experiment does not fit our assumptions. We are not considering that light is a wave with different frequencies. Therefore we can not model more complicated optical effects like the interference in soap bubbles, rainbows from prisms, or polarization. Some renderers are designed to model these effects (particularly for scientific applications) however it is normally ignored due to increased computation and complexity for marginal visual improvement.