Per-pixel displacement mapping using hybrid cone approach

The cone tracing is one of the best techniques for real time rendering of microreliefs. To find the intersection between the viewing ray and the microrelief, this technique use the empty space encoded in the form of top-opened cones. Cones are calculated in a preprocessing stage and are stored in a texture. There are two versions of this technique, the first one uses a conservative cone and the second uses a relaxed one. In this paper, we present the third version that uses the hybrid cone situated between the two already mentioned cones.