v4.10.0

HIGHLIGHTS:

• SIGMA: notable IQ improvements (less flickering in motion, better responsiveness)
• REBLUR / RELAX: improvements and bug fixes
• NRD integration: API changes, dictated by new optional features

BREAKING CHANGES:

• no changes in NRD \O/
• Integration: read UPDATE.md

DETAILS:

• NRD: deleted unnecessary curvature flattening if delta between normals is close to normal ULP
• REBLUR: eliminated repacking for normal-roughness
• REBLUR: improved specular tracking
• REBLUR: improved "vmb" specular tracking on moving objects
• REBLUR: fixed and improved logic for ReblurSettings::responsiveAccumulationRoughnessThreshold
• RELAX: fixed lots of places without UnpackViewZ
• RELAX: made ViewZ FP16 compatible
• SIGMA: improved penumbra size weighting scheme
• SIGMA: TS - fixed rare potential 1 pixel leaks
• SIGMA: TS - proper early out in regions with hard shadows
• SIGMA: TS - less flickering in motion
• Integration: added a few checks to increase robustness
• Integration: the constructor replaced with an initialization struct
• Integration: exposed demoteFloat32to16 option
• Integration: exposed promoteFloat16to32 option
• Integration: removed the need to pass format (modern NRI allows to query it)
• Integration: refactoring, rotating around replacing Nrd prefix with nrd:: namespace
• updated docs

v4.9.4

HIGHLIGHTS:

• Cmake: minor improvements
• updated deps

v4.9.3

HIGHLIGHTS:

• bug fixes and improvements

DETAILS:

• REBLUR: fixed potential edge smoothing
• updated docs
• updated deps

v4.9.2

HIGHLIGHTS:

• improvements and bug fixes

BREAKING CHANGE:

• MemoryAllocatorInterface renamed to AllocationCallbacks

DETAILS:

• NRD: fixed NRD_STATIC_LIBRARY
• REBLUR: improved MV patching (if enabled)
• updated docs

v4.9.1

HIGHLIGHTS:

• improvements and bug fixes

DETAILS:

• NRD: improved per-frame random rotations offer better distribution of samples across frames (barely visible in OCCLUSION and SIGMA)
• REFERENCE: split-screen and resolution scaling related bug fixes

v4.9.0fix

HIGHLIGHTS:

• GCC: fixed compilation
• updated GitHub workflow

v4.9.0

HIGHLIGHTS:

• NRD: exposed CommonSettings::strandMaterialID and CommonSettings::strandThickness to improve denoising on hair and grass
• REBLUR: improved IQ without stabilization pass
• REBLUR: improved behavior in disocclusions and in case of a short history
• REBLUR: improved specular tracking
• REBLUR: exposed new settings hitDistanceStabilizationStrength and fireflySuppressorMinRelativeScale
• improvements and bug fixes

BREAKING CHANGES:

• REBLUR: changed usage of maxBlurRadius and its default value, old values should be multiplied by 2

DETAILS:

• NRD: improved comments in main headers, added missing info
• NRD: added optional NRD_FrontEnd_TrimHitDistance to NRD.hlsli
• NRD: added NRD_GetNormalizedStrandThickness helper to NRD.hlsli
• NRD: exposed CommonSettings::strandMaterialID and CommonSettings::strandThickness
• NRD: exposed NRD_USE_HISTORY_CONFIDENCE, NRD_USE_DISOCCLUSION_THRESHOLD_MIX and NRD_USE_BASECOLOR_METALNESS macro switches allowing to disable almost dead and rarely used code
• SIGMA: fixed very rare 2 pixel wide bleeding (introduced by Temporal Stabilization pass under special conditions)
• RELAX: fixed disocclusion threshold scaling
• RELAX: added missing "rect origin" offsets to IN_DIFF_CONFIDENCE, IN_SPEC_CONFIDENCE and IN_DISOCCLUSION_THRESHOLD_MIX inputs
• REBLUR / RELAX: slope scale should not make disocclusion threshold > 1
• REBLUR / RELAX: hooked up strandMaterialID and updated disocclusion threshold logic
• REBLUR: exposed ReblurSettings::hitDistanceStabilizationStrength allowing to control AO/SO responsiveness in the temporal stabilization pass and to reach parity with OCCLUSION denoisers if set to "0"
• REBLUR: exposed ReblurSettings::fireflySuppressorMinRelativeScale (was previously a macro)
• REBLUR: relaxed temporal stabilization pass on strandMaterialID
• REBLUR: improved specular tracking by optimizing "smb" based accumulation
• REBLUR: improved firefly suppressor (making REBLUR more usable without stabilization)
• REBLUR: improved validation (highlights hitT outside of [0; 1] range)
• REBLUR: removed error estimation used for blur radius correction (barely affected image since ~v4 release)
• REBLUR: reduced ghosting on variadic roughness (more roughness details)
• REBLUR: implemented linear progression of blur radius (much cleaner disocclusions)
• REBLUR_OCCLUSION: disabled firefly suppression for hit distances (could lead to bias in disocclusions)
• REBLUR_OCCLUSION: anti-firefly is disabled in DIRECTIONAL_OCCLUSION too
• REBLUR_OCCLUSION: minor fast history improvements
• updated MathLib
• updated docs
• polishing

v4.8.2

HIGHLIGHTS:

• SIGMA improvements

DETAILS:

• SIGMA: fixed 1 pixel wide blur on shadows with penumbra size < 1 pixel
• SIGMA: better behavior for multi-layered shadows (a narrow penumbra inside a wide penumbra)
• SIGMA: reduced potential flickering
• SIGMA: fixed suboptimal output of the blur pass affecting TS pass
• SIGMA: improved weights for moments calculations in TS pass
• NRD: resolved some TODOs
• updated deps
• updated docs

v4.8.1

v4.8.1:

HIGHLIGHTS:

• Bug fixes and improvements

DETAILS:

• REBLUR_SH: fixed mis-normalized weighted sum for diffSh and specSh in HistoryFix pass (the regression appeared after finding a better initial weight for the center pixel)
• REBLUR_SH: minor performance optimization in "Temporal Stabilization" pass
• REBLUR_SH: fixed "touching" of specSh.w in HistoryFix pass, which is "modified roughness" and must not be processed in any way

v4.8.0

HIGHLIGHTS:

• NRD: improved FP16 viewZ support
• SIGMA: made more friendly to per light shadow denoising (multi-light scenario)
• removed unused (non-denoisers) SPECULAR_REFLECTION_MV & SPECULAR_DELTA_MV

DETAILS:

• NRD: exposed CommonSettings::viewZScale, which should help to improve FP16 support
• SIGMA: IN_SHADOWDATA => IN_PENUMBRA, IN_SHADOW_TRANSLUCENCY => IN_TRANSLUCENCY
• SIGMA: massaged front-end functions
• SIGMA: switched to use common IN_VIEWZ input instead of a custom one (it eliminates a need to clone ViewZ in case of multiple lights)
• REBLUR: minor tweaks
• SPECULAR_REFLECTION_MV: deprecated and removed
• SPECULAR_DELTA_MV: deprecated and removed
• updated docs