Modified probe structure that maintains high spatial resolution perpendicular to the sampling direction. Resolves hard shadows and volumetrics with similar computational cost to standard RC.
Main limitation: O(N × X²) memory, which is the primary barrier to 3D.
“Radial HRC” was an earlier community experiment testing whether small perpendicular probe spacing could resolve sharp shadows — a precursor to the ideas formalised in the paper.
- Paper: holographic-rc
- Reference implementation (Rust/CUDA): entropylost/amitabha
- Volumetric HRC: Yaazarai/Volumetric-HRC
- Shadertoy (Suslik): Holographic Radiance Cascades
- Ray visualiser: Desmos by fad