  We present a networked, high performance graphics system that combines
dynamic, high quality, ray traced global illumination computed on a server with
direct illumination and primary visibility computed on a client. This approach
provides many of the image quality benefits of real-time ray tracing on
low-power and legacy hardware, while maintaining a low latency response and
mobile form factor. Our system distributes the graphic pipeline over a network
by computing diffuse global illumination on a remote machine. Global
illumination is computed using a recent irradiance volume representation
combined with a novel, lossless, HEVC-based, hardware-accelerated encoding, and
a perceptually-motivated update scheme. Our experimental implementation streams
thousands of irradiance probes per second and requires less than 50 Mbps of
throughput, reducing the consumed bandwidth by 99.4% when streaming at 60 Hz
compared to traditional lossless texture compression. This bandwidth reduction
allows higher quality and lower latency graphics than state-of-the-art remote
rendering via video streaming. In addition, our split-rendering solution
decouples remote computation from local rendering and so does not limit local
display update rate or resolution.
