An Implementation of Adaptive Tile Subdivision on the GPU

Figure 1: One of the applications of adaptive tiling is adaptive ray-bundle tracing. This scene has 45.3M texel light maps (4.9 km in diameter, 3.7M triangles). These light maps are precomputed using ray-bundle tracing with adaptive tiling. Figure 2: Adaptive tiling according to importance based on a quadtree (i.e., mipmap of the importance map). Left: importance map viewed from a sample direction. (importance is represented with brightness). For baking light maps using ray-bundle tracing, the importance map is given by rendering light map texel densities. Right: quadtree-based adaptive tile subdivision.