Combinatorial Bidirectional Path-Tracing
for Efficient Hybrid CPU/GPU Rendering
This paper presents a reformulation of bidirectional path-tracing that adequately divides the algorithm into pro-
cesses efficiently executed in parallel on both the CPU and the GPU. We thus benefit from high-level optimization
techniques such as double buffering, batch processing, and asyncronous execution, as well as from the exploitation
of most of the CPU, GPU, and memory bus capabilities. Our approach, while avoiding pure GPU implementation
limitations (such as limited complexity of shaders, light or camera models, and processed scene data sets), is more
than ten times faster than standard bidirectional path-tracing implementations, leading to performance suitable
for production-oriented rendering engines.
http://www.irit.fr/~Anthony.Pajot/publis/cbpt/cbpt.pdf
