A diffraction model of the pupil and eyelashes for rendering blooming effect and streaks of light. In this paper, techniques for rendering road surfaces under various conditions are discussed. Rendering road surfaces is quite useful for the evaluation of driving safety, and it will play an important part in the development of drive simulators. Light sources with high intensity often disturb drivers especially under wet road surface conditions. This paper proposes two models, a reflection model for road surfaces taking into account weather conditions, and a model on streaks of light taking into account both refraction and diffraction of light.
Some examples demonstrate the possibility of applications for drive simulators in the future.
Only four points are used to define the penumbra area cast by a contour edge so that little strage is needed for penumbra area. Complex penumbrae caused by such objects as curtains can be rendered. Calculation of illumination in the shadows cast by natural objects, such as trees, mapped on a transparent virtual plane is available. In order to show the usefulness of the proposed method, some computer-generated images with penumbrae are compared with those without penumbrae. The demand upon highly realistic visual simulation on outdoor scenes rapidly has been increasing.