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Rendering of transparent optically anisotropic objects

At the present time, computer graphics demonstrates a lot of achievements in physically correct rendering of opaque objects and optically isotropic transparent and translucent objects (such as glass, diamond, or water). This paper examines the current state of art in the algorithms for physically accurate calculation of images of 3D scenes including transparent optically anisotropic objects (feldspar, KDP, etc.). It should be noted that very little work has been made in this field, with the most important of it in this century. Only rendering of transparent optically anisotropic objects (without absorption) is considered here.