This paper presents a new approach to achieve interactive frame rates with the ray-tracing image synthesis method used originally for high quality, off-line rendering. The rendering system uses a spatial subdivision algorithm and SIMD instructions to speed up the rendering process.
Pictures from the paper
Importance sampling
Figure 1. The rays belong to white pixels are terminated before they reached the limit of the ray-tracing depth.
Figure 2. The white pixels are represent the region wherein we used supersampling.
Final result
Figure 3. Example scene.
PDF version of the paper.