Rendering methods for models with complicated micro structures
Shun Iwasawa, Naohiro Shichijo, Yoichiro Kawaguchi · 2004
The male Morpho Butterflies have peculiar vivid cobalt blue wings caused by microscopic structures on its scales. Its color is due to structural specificity and not caused by its pigments. Those reflectional color effects are known as “structural colors”. The methods to represent structural colors have been extensively studied from the viewpoint of anisotropic reflection, but those previous studies were based on phenomenological modeling of measured reflectance functions and thus specific microstructure of the target surfaces was disregarded. In this paper, a physically sound structural model is proposed taking account of the effect of interference, diffraction, light scattering, anisotropy and semiperiodicity of microstructure on its surface and a new rendering method is developed.