Real Time Scratches and Grooves

We present a GPU-accelerated algorithm to render surface detail features like scratches and grooves in real time. Our method efficiently models these features using a continuous representation that is stored in two textures. The first texture plays the role of a hash and provides pointers to the second texture containing the scratches paths, profiles and material information. This data is evaluated by a fragment shader at the GPU, resulting in an accurate and fast rendering of the surface detail. Such kind of detail is rendered without using additional geometry, thus considerably reducing the size of the geometry to be processed and accelerating computations.