AMD FSR 4.1 (collaboration branch) #828

Closed

madebyjordan wants to merge 7 commits from amd/fsr4 into main

madebyjordan commented

2026-11-08 22:43:12 +00:00

(Migrated from github.com)

Adds AMD FSR 4.1 in place of OoT's own upscale: steadier edges and less shimmer. Opt-in from the Insert menu, off by default. Windows, and Linux with a Vulkan FSR 4 library.

Builds on #850 (DLSS), which builds on #849. The new commits are 040a9ab, 211585a and N3oTraX's Linux support (merged as bb87ae2).

How it works

Uses #850's colour, depth and camera motion. FSR is a second backend; DLSS wins if both are on.
Moves the 3D by a sub-pixel amount each frame, the jitter FSR needs to rebuild detail. The game draws without one.
AMD's two signed DLLs load at run time from beside hookshot.exe. Only AMD's MIT headers are added; no AMD binaries.
The Resolution row sets the input size: 75% = Quality, 50% = Performance, 100% = anti-aliasing only.

Tested

RX 6700 XT (RDNA 2), Windows: FSR 4.1.2, 1536x864 to 2048x1152.
RX 7900 XTX (RDNA 3), Linux (N3oTraX): FSR 4.1.1 INT8 at 3416x1440 and 5120x2160, no crash or device loss. It used a third-party Vulkan FSR 4 library (fsr4-vk); none is included here.
No errors and no fallbacks to the game's upscale. FSR kept its history the whole session.
Looks right: no edge flicker or haze stripes, which the same code had on the Lichii emulator.
tests/run_all.py: 94 passed, including the new test_fsr_jitter.py. The 3 failures also fail on #850's head on this PC.

Not yet

Frame-rate cost, other AMD cards, Resolution 100%.
Characters that move on their own have no motion vectors, so they may trail (same as #850).

Using it

Put amd_fidelityfx_loader_vk.dll and amd_fidelityfx_upscaler_vk.dll (FidelityFX SDK 2.4, signedbin) beside bin\hookshot.exe, then turn on Insert → Graphics → AMD FSR 4.1. On Linux, put a Vulkan FSR 4 library (amd_fidelityfx_upscaler_vk.so) beside the game instead. Overrides: RX_FSR4=0/1, RX_FSR4_DIR, RX_FSR4_JITTER=0.

#577 uses the same AMD API for FSR 4 at native resolution; the vendored headers are identical, so either can land first. #821/#822 take a different route (FSR 3.1 compiled from AMD's source code).

Linux support by @N3oTraX (from #857). Ported from my FSR 4.1 work on Lichii (madebyjordan/Lichii-Hyrule). AI-assisted (Claude Code).

🤖 Generated with Claude Code

Adds **AMD FSR 4.1** in place of OoT's own upscale: steadier edges and less shimmer. Opt-in from the Insert menu, off by default. Windows, and Linux with a Vulkan FSR 4 library. > **Builds on #850** (DLSS), which builds on #849. The new commits are `040a9ab`, `211585a` and N3oTraX's Linux support (merged as `bb87ae2`). ### How it works - Uses #850's colour, depth and camera motion. FSR is a second backend; DLSS wins if both are on. - Moves the 3D by a sub-pixel amount each frame, the jitter FSR needs to rebuild detail. The game draws without one. - AMD's two signed DLLs load at run time from beside `hookshot.exe`. Only AMD's MIT headers are added; no AMD binaries. - The **Resolution** row sets the input size: 75% = Quality, 50% = Performance, 100% = anti-aliasing only. ### Tested - **RX 6700 XT** (RDNA 2), Windows: FSR 4.1.2, 1536x864 to 2048x1152. - **RX 7900 XTX** (RDNA 3), Linux (N3oTraX): FSR 4.1.1 INT8 at 3416x1440 and 5120x2160, no crash or device loss. It used a third-party Vulkan FSR 4 library ([fsr4-vk](https://github.com/Astyyyyy/fsr4-vk)); none is included here. - No errors and no fallbacks to the game's upscale. FSR kept its history the whole session. - Looks right: no edge flicker or haze stripes, which the same code had on the Lichii emulator. - `tests/run_all.py`: 94 passed, including the new `test_fsr_jitter.py`. The 3 failures also fail on #850's head on this PC. ### Not yet - Frame-rate cost, other AMD cards, Resolution 100%. - Characters that move on their own have no motion vectors, so they may trail (same as #850). ### Using it Put `amd_fidelityfx_loader_vk.dll` and `amd_fidelityfx_upscaler_vk.dll` (FidelityFX SDK 2.4, `signedbin`) beside `bin\hookshot.exe`, then turn on **Insert → Graphics → AMD FSR 4.1**. On Linux, put a Vulkan FSR 4 library (`amd_fidelityfx_upscaler_vk.so`) beside the game instead. Overrides: `RX_FSR4=0/1`, `RX_FSR4_DIR`, `RX_FSR4_JITTER=0`. ### Related #577 uses the same AMD API for FSR 4 at native resolution; the vendored headers are identical, so either can land first. #821/#822 take a different route (FSR 3.1 compiled from AMD's source code). Linux support by @N3oTraX (from #857). Ported from my FSR 4.1 work on Lichii ([madebyjordan/Lichii-Hyrule](https://github.com/madebyjordan/Lichii-Hyrule)). AI-assisted (Claude Code). 🤖 Generated with [Claude Code](https://claude.com/claude-code)

👍 1

NotRexed commented

2026-11-09 05:30:29 +00:00

(Migrated from github.com)

Thank you! This is still stacked on #818, which was closed and split into #849 (merged) and #850. Closing to keep the queue clear — please rebase on current main and reopen; thanks! (Onto main, or onto #850 once it is back.)

madebyjordan commented

2026-11-09 05:43:27 +00:00

(Migrated from github.com)

Rebased onto current main. GitHub won't let me reopen this one, so it continues in #1008. #850 is closed too, so it now carries #850's DLSS commit unchanged (BlueHeisenberg's, credited), since FSR builds on its colour, depth and motion code. Merges cleanly; build and tests pass.

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