Chandra is an implementation of Split Radiance Cascades; a 3D global illumination method utilizing sparse (hashmap-based) Radiance Cascades and ray splitting to reduce ray count. For more details, see the paper.

File tree (src/):

• algorithm/rc.rs: Implementation of merging and ray splitting for Split RC.
• algorithm/trace.rs: Ray generation and tracing for Split RC.
• algorithm/splat.rs: Final shading / irradiance computation step; current codepath used is shade_optimized_32 and calculate_irradiance.
• cache.rs: Radiance cache data structure implementation.
• table.rs: Hashmap implementation.
• main.rs: Entry point to the program.
• algorithm/ddgi.rs: DDGI implementation used in comparisons.
• algorithm/ris.rs: Reservoir sampling experiment.
• algorithm/denoise.rs: Bindings to OIDN for the denoised monte-carlo comparison.

Join the Radiance Cascades Discord for more information and to discuss the algorithm!