Interactive Rendering of Specular Surfaces Taking into Account Self Reflection

To render specular surfaces, reflections play an important role to enhance the realism. For concave surfaces, the effects of self-reflections that the surface reflects a part of the surface itself are necessary to create realistic images. This paper presents an interactive rendering of rigid specular surfaces taking into account self-reflections. In the preprocess, sample rays incident onto each vertex of the specular surface are traced taking into account the reflection, until they do not intersect the surface. The outgoing reflected directions are stored in look-up tables. In the rendering process, reflections of the environment taking into account the self-reflection are rendered by using the precomputed look-up tables. Our method accelerates the rendering by using a GPU and achieves interactive rendering.