; OptiScaler.ini overrides for Forza Horizon 5 on RDNA 3 (Navi 32) under
; Linux/Proton with FSR 4 INT8 enabled. Tested on OptiScaler 0.9.1.
;
; Keys not listed here fall through to OptiScaler's "auto" defaults
; (Config.cpp: missing keys silently resolve to std::nullopt -> _defaultValue).
;
; Sources:
;   - https://github.com/optiscaler/OptiScaler/wiki/Forza-Horizon-5
;   - https://github.com/optiscaler/OptiScaler/wiki/FSR4-Compatibility-List
;
; Companion launch-option env vars (set via programs.steam.config in
; hosts/yarn/default.nix):
;   PROTON_FSR4_UPGRADE=1
;   DXIL_SPIRV_CONFIG=wmma_rdna3_workaround   (RDNA 3 INT8 visuals fix)

[Inputs]
; FSR2 inputs are buggy in FH5; OptiScaler 0.7.8+ auto-disables them per game
; but explicit is safer across version bumps. Source: FH5 wiki ("Known Issues").
EnableFsr2Inputs=false

[FSR]
; DirectX 12 Agility SDK upgrade. Required for the FSR 4 path on RDNA 3 INT8
; under Proton (the FFX SDK shipped with the game predates FSR 4). Source:
; FSR4 Compatibility wiki, "Linux Setup" section.
Fsr4Update=true

; FH5 wiki: 0.65 fixes flickering lights and reduces car ghosting with FSR-FG.
DlssReactiveMaskBias=0.65

; FSR 4 on RDNA 3 IQ recommendation; mitigates white flashes and artifacting
; from the INT8 emulation path. Source: FSR4 Compatibility wiki, "Image Quality".
FsrNonLinearColorSpace=true

[Spoofing]
; FH5 wiki recommendation. The auto default on AMD spoofs to NVIDIA, which
; OptiScaler 0.9 deliberately drops for FH5; pinning false here makes the
; behavior version-proof.
Dxgi=false