Daylighting Simulation on the GPU

Accelerad is a free suite of programs for fast and accurate lighting and daylighting analysis and visualization. It was developed by Nathaniel Jones at the MIT Sustainable Design Lab and modeled after the popular Radiance software suite developed by Greg Ward at Lawrence Berkeley National Laboratory. In order to allow for smooth adoption among Radiance users and software developers, Accelerad maintains compatibility with Radiance file formats, materials, and command-line arguments.

Parallelism makes Accelerad up to forty times faster using OptiX™, a ray tracing engine built for the graphics processing unit (GPU). Accelerad is ideal for simulations that would be impractical to carry out on CPUs because of their size, such as rpict renderings with large numbers of ambient bounces or rtrace calculations over many thousands of sensor points. New compatibility with rcontrib allows fast simulation of annual climate-based daylighting metrics throgh three-phase and five-phase simulations.

AcceleradRT, the next generation in daylighting simulation, is an interactive interface for real-time daylighting, glare, and visual comfort analysis. AcceleradRT uses progressive path tracing to provide daylighitng simulation results in real time with validated accuracy. It includes AcceleradVR, an immersive visualization interface compatible with most virtual reality headsets. AcceleradRT is currently available for beta testing to registed Accelerad users.