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Later: investigate integrating AMD FSR 3.1 upscaler as an alternative to our TAA upscaler #191

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opened 2026-09-29 23:32:09 +00:00 by sky_line · 1 comment

sky_line commented

2026-09-29 23:32:09 +00:00

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Later / optional. Our own FSR-2-class upscaler (TAA resolve, #181-#184) is the path for now; this ticket is to revisit pulling in AMD's upscaler if we still want it.

Why consider it

FSR 2/3.1 is mature and tuned across thousands of titles; most of what we fixed in #182 (edge disocclusion, jitter-dependent rejection, locks, kernel width) is solved there, and it has more (luma-instability detection, lock lifetimes, Lanczos reconstruction, transparency & composition masks).
MIT licence. FSR 3.1 decouples the upscaler from frame generation -> a later path to frame gen.
Our inputs already match what it needs: render/display split (#181), jitter, motion vectors (incl. rigged), depth, reactive mask, exposure.

What to check

Does the FidelityFX SDK FSR 3.1 Vulkan backend build and run on Linux with our toolchain (and Windows cross build)? As a 3p autobuild package on applejack CI.
Input adaptation: motion vector scale/sign, depth convention (+ reversed-Z if #188 lands), jitter sign, reactive / transparency masks, exposure texture, HDR vs LDR input, where in the post chain it runs.
Integrate behind the same interface as an Upscaler choice ("Slipstream" vs "AMD FSR 3.1"), A/B in-world, keep ours as fallback.
Cost (GPU ms, VRAM) vs ours.

Related: #181, #182, #183, #184, #6.

Later / optional. Our own FSR-2-class upscaler (TAA resolve, #181-#184) is the path for now; this ticket is to revisit pulling in AMD's upscaler if we still want it. ### Why consider it - FSR 2/3.1 is mature and tuned across thousands of titles; most of what we fixed in #182 (edge disocclusion, jitter-dependent rejection, locks, kernel width) is solved there, and it has more (luma-instability detection, lock lifetimes, Lanczos reconstruction, transparency & composition masks). - MIT licence. FSR 3.1 decouples the upscaler from frame generation -> a later path to frame gen. - Our inputs already match what it needs: render/display split (#181), jitter, motion vectors (incl. rigged), depth, reactive mask, exposure. ### What to check 1. Does the FidelityFX SDK FSR 3.1 **Vulkan backend build and run on Linux** with our toolchain (and Windows cross build)? As a 3p autobuild package on applejack CI. 2. Input adaptation: motion vector scale/sign, depth convention (+ reversed-Z if #188 lands), jitter sign, reactive / transparency masks, exposure texture, HDR vs LDR input, where in the post chain it runs. 3. Integrate behind the same interface as an Upscaler choice ("Slipstream" vs "AMD FSR 3.1"), A/B in-world, keep ours as fallback. 4. Cost (GPU ms, VRAM) vs ours. Related: #181, #182, #183, #184, #6.

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2026-09-29 23:32:09 +00:00

sky_line referenced this issue

2026-09-29 23:45:10 +00:00

FSR 2/4: temporal upscaling in the TAA resolve (clean_taa.comp) #182

sky_line referenced this issue

2026-09-29 23:45:10 +00:00

FSR upscaling #6

sky_line referenced this issue

2026-10-04 02:45:46 +00:00

FSR upscaling #6

sky_line commented

2026-10-04 02:46:29 +00:00

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Verified done: AMD FSR 3.1 is integrated as an alternative to our TAA upscaler (RenderVKUpscaleMode 6-11, Native AA + quality presets). Commits: f94bd4c861 (vendored FidelityFX FSR 3.1.4), 6eb3687bf9 (FSR 3.1 upscaler). Shipped in v1.0.0-beta.1. Follow-ups tracked in #246 (FSR-only AA) and #261.

Verified done: AMD FSR 3.1 is integrated as an alternative to our TAA upscaler (RenderVKUpscaleMode 6-11, Native AA + quality presets). Commits: f94bd4c861 (vendored FidelityFX FSR 3.1.4), 6eb3687bf9 (FSR 3.1 upscaler). Shipped in v1.0.0-beta.1. Follow-ups tracked in #246 (FSR-only AA) and #261.

sky_line closed this issue

2026-10-04 02:46:29 +00:00

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sky_line/Slipstream#191

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