Case study

FSR 4 INT8: reconstructed GPU passes and comparison harness

An FSR 4.1.1 INT8 investigation reconstructs the upscaler’s GPU passes in HLSL and compares their outputs with AMD’s compiled kernels through a D3D12 harness. The author reports byte-identical offline results for the documented passes and supplies an FFX-compatible provider build that obtains network weights from a user-supplied official DLL. Colour-mode paths and live frames have narrower comparison evidence.

Targets: Binary
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06

Stars: 2
Last commit: 2026-10-10
Language: HLSL
License (GitHub): MIT

GitHub data as of 2026-11-09

Copy as Markdown View JSON Cite

Requirements & limits

Prerequisites: Windows 10/11, Visual Studio with MSVC v143+, CMake and dxc are required for the documented build.
Prerequisites: The provider build requires a user-supplied official FSR 4.1.1 DLL and FidelityFX-SDK checkout.
Testing evidence: The author reports byte-exact offline kernel comparisons; live output is not compared frame by frame.
License: MIT license.

Cite

BibTeX

@misc{fsr4-int8-reconstruction-case,
  title = {{FSR 4 INT8: reconstructed GPU passes and comparison harness}},
  howpublished = {\url{https://github.com/int3rrobang/fsr4-int8-reverse-engineering}},
  url = {https://github.com/int3rrobang/fsr4-int8-reverse-engineering},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/fsr4-int8-reconstruction-case/}}
}

Plain text

FSR 4 INT8: reconstructed GPU passes and comparison harness. https://github.com/int3rrobang/fsr4-int8-reverse-engineering (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/fsr4-int8-reconstruction-case/

Useful? Star Awesome REA on GitHub2.4k

About this entry

The description was reviewed against primary sources.

Report an outdated entry Suggest a translation fix

Primary sources

README.md GitHub · int3rrobang/fsr4-int8-reverse-engineering · Revision 739e667
docs/README.md GitHub · int3rrobang/fsr4-int8-reverse-engineering · Revision 739e667