References

Engine changes carry their reference in the code as // AK CHANGES - <Feature> <reference> <slide / file>.

Visibility Buffer

Guerrilla Games, "Adventures with Deferred Texturing in Horizon Forbidden West", GDC 2022.
J. Fuller and D. Hammer, "Variable-Rate Compute Shaders in DOOM: The Dark Ages", GDC 2025.
T. Sousa and J. Geffroy, "The devil is in the details: idTech 666", SIGGRAPH 2016.
C. Burns and W. Hunt, "The Visibility Buffer: A Cache-Friendly Approach to Deferred Shading", JCGT 2013.
The Forge, Visibility Buffer samples.
Wicked Engine, visibility buffer shaders.
Unreal Engine Nanite: NaniteShadeBinning.usf, NaniteCullRaster.cpp.

C. Peters, Spectral rendering, parts 1-3, 2025.
I. Mallett and C. Yuksel, "Spectral Primary Decomposition for Rendering with sRGB Reflectance", EGSR 2019.
C. Wyman, P.-P. Sloan and P. Shirley, "Simple Analytic Approximations to the CIE XYZ Color Matching Functions", JCGT 2013.
CIE 015:2018, Colorimetry, 4th edition.
Spectral primaries.

AMD, FidelityFX Single Pass Downsampler.
AMD, FidelityFX Parallel Sort.
C. Wyman and M. McGuire, Hashed Alpha Testing, I3D 2017.
Unreal Engine 6: cascaded shadow-depth reuse (backported).
NVIDIA ShadowWorks: PCSS+ (reconstructed directional filter).
Microsoft Flight Simulator forums, ARPC atmosphere parameters.
Polyphony Digital, Gran Turismo 7 tonemapper (XGT7Tonemap.ush).
K. Myers (Treyarch), "Shadows of Cold War: A Scalable Approach to Shadowing", GDC 2021: DPCF, slides 60-64.
Google Filament, shadowing.fs: DPCF implementation reference.
Unity HDRP, HDPCSS.hlsl: PCSS Cone.

NVIDIA GameWorks, Unreal Engine 4.21 branch: hull/domain shader passes and material tessellation (the port's code reference).
A. Vlachos, J. Peters, C. Boyd and J. Mitchell, "Curved PN Triangles", I3D 2001.
J. McDonald and M. Kilgard, "Crack-Free Point-Normal Triangles using Adjacent Edge Normals", NVIDIA, 2010.