v4.2.2:

HIGHLIGHTS: - various improvements & bug fixes DETAILS: - NRD: added optional "NRD_SG_Rotate" - NRD: added missing sanitization of direction in SH packing functions - NRD: added explicit control on which types of shaders (DXBC, DXIL and/or SPIRV) to compile and embed into the binary - REBLUR: added more checks to avoid accessing potential NANs if a pixel is outside of denoising range - REBLUR: fixed anti-firefly with enabled dynamic resolution scaling - SIGMA: minor bug fix - updated dependencies - updated README
NVIDIA-RTX · Jul 4, 2023 · c20d25a · c20d25a
1 parent 3c881ae
commit c20d25a
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Showing 18 changed files with 862 additions and 677 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -1,27 +1,29 @@
 cmake_minimum_required (VERSION 3.15)
 
 # Options
-option (NRD_DISABLE_SHADER_COMPILATION "Disable shader compilation" OFF)
-option (NRD_USE_PRECOMPILED_SHADERS "Use precompiled (embedded) shaders" ON)
-option (NRD_STATIC_LIBRARY "Build static library" OFF)
+if (WIN32)
+    set (IS_WIN ON)
+else ()
+    set (IS_WIN OFF)
+endif ()
 
-# Windows specific
-if(WIN32)
-    option (NRD_PRECOMPILE_SPIRV_SHADERS "Precompile SPIRV shaders" ON)
-    option (NRD_PRECOMPILE_D3D_SHADERS "Precompile DXIL shaders" ON)
-endif()
+option (NRD_STATIC_LIBRARY "Build static library" OFF)
+option (NRD_EMBEDS_SPIRV_SHADERS "NRD embeds SPIRV shaders" ON)
+option (NRD_EMBEDS_DXIL_SHADERS "NRD embeds DXIL shaders" ${IS_WIN})
+option (NRD_EMBEDS_DXBC_SHADERS "NRD embeds DXBC shaders" ${IS_WIN})
+option (NRD_DISABLE_SHADER_COMPILATION "Disable shader compilation" OFF)
 
 # Is submodule?
 if (${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR})
-    set(IS_SUBMODULE OFF)
-else()
-    set(IS_SUBMODULE ON)
-endif()
+    set (IS_SUBMODULE OFF)
+else ()
+    set (IS_SUBMODULE ON)
+endif ()
 
 # Cached
 if (NOT IS_SUBMODULE)
     set (CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "")
-endif()
+endif ()
 
 set (NRD_DXC_CUSTOM_PATH "custom/path/to/dxc" CACHE STRING "Custom DXC to use if Vulkan SDK is not installed")
 set (NRD_SHADERS_PATH "" CACHE STRING "Shader output path override")
@@ -73,13 +75,20 @@ endif ()
 # Compile definitions
 set (COMPILE_DEFINITIONS NRD_NORMAL_ENCODING=${NRD_NORMAL_ENCODING} NRD_ROUGHNESS_ENCODING=${NRD_ROUGHNESS_ENCODING})
 
+if (NRD_EMBEDS_SPIRV_SHADERS)
+    set (COMPILE_DEFINITIONS ${COMPILE_DEFINITIONS} NRD_EMBEDS_SPIRV_SHADERS)
+endif ()
+
+if (NRD_EMBEDS_DXIL_SHADERS)
+    set (COMPILE_DEFINITIONS ${COMPILE_DEFINITIONS} NRD_EMBEDS_DXIL_SHADERS)
+endif ()
+
+if (NRD_EMBEDS_DXBC_SHADERS)
+    set (COMPILE_DEFINITIONS ${COMPILE_DEFINITIONS} NRD_EMBEDS_DXBC_SHADERS)
+endif ()
+
 if (WIN32)
-    if (NRD_PRECOMPILE_SPIRV_SHADERS AND NOT NRD_PRECOMPILE_D3D_SHADERS)
-        set (COMPILE_DEFINITIONS ${COMPILE_DEFINITIONS} NRD_ONLY_SPIRV_SHADERS_AVAILABLE=1)
-    endif ()
     set (COMPILE_DEFINITIONS ${COMPILE_DEFINITIONS} WIN32_LEAN_AND_MEAN NOMINMAX _CRT_SECURE_NO_WARNINGS _UNICODE UNICODE _ENFORCE_MATCHING_ALLOCATORS=0)
-else ()
-    set (COMPILE_DEFINITIONS ${COMPILE_DEFINITIONS} NRD_ONLY_SPIRV_SHADERS_AVAILABLE=1)
 endif ()
 
 # External/MathLib
@@ -135,28 +144,27 @@ set_target_properties (${PROJECT_NAME} PROPERTIES LIBRARY_OUTPUT_DIRECTORY "${GL
 set_target_properties (${PROJECT_NAME} PROPERTIES ARCHIVE_OUTPUT_DIRECTORY "${GLOBAL_BIN_OUTPUT_PATH}/$<CONFIG>")
 message ("NRD output path: '${GLOBAL_BIN_OUTPUT_PATH}'")
 
-# External/ShaderMake
-if (NOT TARGET ShaderMake)
-    set (SHADERMAKE_BIN_OUTPUT_PATH ${GLOBAL_BIN_OUTPUT_PATH} CACHE STRING "")
-    add_subdirectory (External/ShaderMake)
-endif ()
-
 # Shaders
-if (NRD_USE_PRECOMPILED_SHADERS)
+if (NOT NRD_DISABLE_SHADER_COMPILATION)
     target_include_directories (${PROJECT_NAME} PRIVATE "${NRD_SHADERS_PATH}")
-    target_compile_definitions (${PROJECT_NAME} PRIVATE NRD_USE_PRECOMPILED_SHADERS)
 
     file (GLOB_RECURSE SHADERS "Shaders/*.hlsl" "Shaders/*.hlsli" "External/MathLib/*.hlsli")
     set_source_files_properties (${SHADERS} PROPERTIES VS_TOOL_OVERRIDE "None")
-
-    # Arguements for ShaderMake
-    set(SHADERMAKE_GENERAL_ARGS 
-        --WX
-        --header ${NRD_SHADER_BINARIES} 
+
+    # External/ShaderMake
+    if (NOT TARGET ShaderMake)
+        set (SHADERMAKE_BIN_OUTPUT_PATH ${GLOBAL_BIN_OUTPUT_PATH} CACHE STRING "")
+        add_subdirectory (External/ShaderMake)
+    endif ()
+
+    # ShaderMake general arguments
+    set (SHADERMAKE_GENERAL_ARGS
+        --header ${NRD_SHADER_BINARIES}
         --flatten
-        --stripReflection 
+        --stripReflection
         --sourceDir "Shaders/Source"
         --allResourcesBound
+        --WX
         -c Shaders.cfg
         -o "${NRD_SHADERS_PATH}"
         -I "External/MathLib"
@@ -166,40 +174,35 @@ if (NRD_USE_PRECOMPILED_SHADERS)
         -D NRD_ROUGHNESS_ENCODING=${NRD_ROUGHNESS_ENCODING}
         -D NRD_INTERNAL
     )
-    if (WIN32)
-        # Arguements for ShaderMake depending on which backend is used
-        set(SHADERMAKE_COMMANDS "")
-        if(NRD_PRECOMPILE_D3D_SHADERS) # DXIL Commands
-            set(SHADERMAKE_COMMANDS ${SHADERMAKE_COMMANDS} COMMAND ShaderMake --useAPI -p DXIL  --compiler "${DXC_PATH}" ${SHADERMAKE_GENERAL_ARGS})
-        endif()
-        if(NRD_PRECOMPILE_D3D_SHADERS) # DXBC Commands
-            set(SHADERMAKE_COMMANDS ${SHADERMAKE_COMMANDS} COMMAND ShaderMake --useAPI -p DXBC  --compiler "${FXC_PATH}" ${SHADERMAKE_GENERAL_ARGS})
-        endif()
-        if(NRD_PRECOMPILE_SPIRV_SHADERS)
-            set(SHADERMAKE_COMMANDS ${SHADERMAKE_COMMANDS} COMMAND ShaderMake --useAPI -p SPIRV --compiler "${DXC_SPIRV_PATH}" ${SHADERMAKE_GENERAL_ARGS}
-                --sRegShift 100
-                --tRegShift 200
-                --bRegShift 300
-                --uRegShift 400
-                )
-        endif()
-
-        # Add the target with the commands
-        add_custom_target (${PROJECT_NAME}_Shaders ALL ${SHADERMAKE_COMMANDS}
-            DEPENDS ShaderMake
-            WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
-            VERBATIM
-            SOURCES ${SHADERS})
-    else ()
-        add_custom_target (${PROJECT_NAME}_Shaders ALL
-            COMMAND ShaderMake -p SPIRV --compiler "${DXC_SPIRV_PATH}" ${SHADERMAKE_GENERAL_ARGS}
-            DEPENDS ShaderMake
-            WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
-            VERBATIM
-            SOURCES ${SHADERS}
+
+    # ShaderMake commands for each shader code container
+    set (SHADERMAKE_COMMANDS "")
+
+    if (NRD_EMBEDS_DXBC_SHADERS)
+        set (SHADERMAKE_COMMANDS ${SHADERMAKE_COMMANDS} COMMAND ShaderMake -p DXBC --compiler "${FXC_PATH}" --useAPI ${SHADERMAKE_GENERAL_ARGS})
+    endif ()
+
+    if (NRD_EMBEDS_DXIL_SHADERS)
+        set (SHADERMAKE_COMMANDS ${SHADERMAKE_COMMANDS} COMMAND ShaderMake -p DXIL --compiler "${DXC_PATH}" --useAPI ${SHADERMAKE_GENERAL_ARGS})
+    endif ()
+
+    if (NRD_EMBEDS_SPIRV_SHADERS)
+        set (SHADERMAKE_COMMANDS ${SHADERMAKE_COMMANDS} COMMAND ShaderMake -p SPIRV --compiler "${DXC_SPIRV_PATH}" ${SHADERMAKE_GENERAL_ARGS}
+            --sRegShift 100
+            --tRegShift 200
+            --bRegShift 300
+            --uRegShift 400
         )
     endif ()
 
+    # Add the target with the commands
+    add_custom_target (${PROJECT_NAME}_Shaders ALL ${SHADERMAKE_COMMANDS}
+        DEPENDS ShaderMake
+        WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+        VERBATIM
+        SOURCES ${SHADERS}
+    )
+
     set_property (TARGET ${PROJECT_NAME}_Shaders PROPERTY FOLDER ${PROJECT_NAME})
     add_dependencies (${PROJECT_NAME} ${PROJECT_NAME}_Shaders)
 endif ()
diff --git a/External/MathLib b/External/MathLib
diff --git a/External/ShaderMake b/External/ShaderMake
diff --git a/Include/NRD.h b/Include/NRD.h
@@ -29,8 +29,8 @@ license agreement from NVIDIA CORPORATION is strictly prohibited.
 
 #define NRD_VERSION_MAJOR 4
 #define NRD_VERSION_MINOR 2
-#define NRD_VERSION_BUILD 1
-#define NRD_VERSION_DATE "25 May 2023"
+#define NRD_VERSION_BUILD 2
+#define NRD_VERSION_DATE "4 July 2023"
 
 #if defined(_MSC_VER)
     #define NRD_CALL __fastcall

diff --git a/Include/NRDDescs.h b/Include/NRDDescs.h
@@ -266,7 +266,7 @@ namespace nrd
         OUT_DELTA_MV,
 
         // (Optional) Debug output (RGBA8+), .w = transparency
-        // Written to if "InstanceCreationDesc::allowValidation = true" and "CommonSettings::enableValidation = true"
+        // Used if "CommonSettings::enableValidation = true"
         OUT_VALIDATION,
 
         //=============================================================================================================================

diff --git a/README.md b/README.md
@@ -1,4 +1,4 @@
-# NVIDIA REAL-TIME DENOISERS v4.2.1 (NRD)
+# NVIDIA REAL-TIME DENOISERS v4.2.2 (NRD)
 
 [![Build NRD SDK](https://github.com/NVIDIAGameWorks/RayTracingDenoiser/actions/workflows/build.yml/badge.svg)](https://github.com/NVIDIAGameWorks/RayTracingDenoiser/actions/workflows/build.yml)
 
@@ -40,7 +40,7 @@ For diffuse and specular signals de-modulated irradiance (i.e. irradiance with "
 - Install on
     - Windows: latest *WindowsSDK* (22000+), *VulkanSDK* (1.3.216+)
     - Linux (x86-64): latest *VulkanSDK*
-    - Linux (aarch64): find a precompiled binary for [*DXC*](https://github.com/microsoft/DirectXShaderCompiler) or disable shader compilation `NRD_DISABLE_SHADER_COMPILATION=OFF`
+    - Linux (aarch64): find a precompiled binary for [*DXC*](https://github.com/microsoft/DirectXShaderCompiler) or disable shader compilation `NRD_EMBEDS_SPIRV_SHADERS=OFF`
 - Build (variant 1) - using *Git* and *CMake* explicitly
     - Clone project and init submodules
     - Generate and build the project using *CMake*
@@ -49,13 +49,15 @@ For diffuse and specular signals de-modulated irradiance (i.e. irradiance with "
     - Run `2-Build`
 
 CMake options:
-- `NRD_DXC_CUSTOM_PATH = "custom/path/to/dxc"` - custom DXC to use if Vulkan SDK is not installed
 - `NRD_SHADERS_PATH` - shader output path override
+- `NRD_STATIC_LIBRARY` - build static library (OFF by default)
+- `NRD_DXC_CUSTOM_PATH` - custom DXC to use if Vulkan SDK is not installed
 - `NRD_NORMAL_ENCODING` - *normal* encoding for the entire library
 - `NRD_ROUGHNESS_ENCODING` - *roughness* encoding for the entire library
-- `NRD_DISABLE_SHADER_COMPILATION` - disable shader compilation (shaders can be compiled on another platform)
-- `NRD_USE_PRECOMPILED_SHADERS` -  use precompiled shaders (will be embedded into the library)
-- `NRD_STATIC_LIBRARY` - build static library
+- `NRD_EMBEDS_DXBC_SHADERS` - NRD compiles and embeds DXBC shaders (ON by default on Windows)
+- `NRD_EMBEDS_DXIL_SHADERS` - NRD compiles and embeds DXIL shaders (ON by default on Windows)
+- `NRD_EMBEDS_SPIRV_SHADERS` - NRD compiles and embeds SPIRV shaders (ON by default)
+- `NRD_DISABLE_SHADER_COMPILATION` - disable shader compilation on the NRD side, NRD assumes that shaders are already compiled externally and have been put into `NRD_SHADERS_PATH` folder
 
 `NRD_NORMAL_ENCODING` and `NRD_ROUGHNESS_ENCODING` can be defined only *once* during project deployment. These settings are dumped in `NRDEncoding.hlsli` file, which needs to be included on the application side prior `NRD.hlsli` inclusion to deliver encoding settings matching *NRD* settings. `LibraryDesc` includes encoding settings too. It can be used to verify that the library meets the application expectations.
 
@@ -247,6 +249,8 @@ else
 }
 ```
 
+Re-jittering math with minorly modified inputs can also be used with RESTIR produced sampling without involving SH denoisers. You only need to get light direction in the current pixel from RESTIR. Despite that RESTIR produces noisy light selections, its low variations can be easily handled by DLSS or other upscaling techs.
+
 # VALIDATION LAYER
 
 ![Validation](Images/Validation.png)

diff --git a/Resources/Version.h b/Resources/Version.h
@@ -23,6 +23,6 @@ Versioning rules:
 
 #define VERSION_MAJOR                   4
 #define VERSION_MINOR                   2
-#define VERSION_BUILD                   1
+#define VERSION_BUILD                   2
 
 #define VERSION_STRING STR(VERSION_MAJOR.VERSION_MINOR.VERSION_BUILD encoding=NRD_NORMAL_ENCODING.NRD_ROUGHNESS_ENCODING)
diff --git a/Shaders/Include/NRD.hlsli b/Shaders/Include/NRD.hlsli
@@ -595,6 +595,7 @@ float4 REBLUR_FrontEnd_PackSh( float3 radiance, float normHitDist, float3 direct
     {
         radiance = any( isnan( radiance ) | isinf( radiance ) ) ? 0 : clamp( radiance, 0, NRD_FP16_MAX );
         normHitDist = ( isnan( normHitDist ) | isinf( normHitDist ) ) ? 0 : saturate( normHitDist );
+        direction = any( isnan( direction ) | isinf( direction ) ) ? 0 : clamp( direction, -NRD_FP16_MAX, NRD_FP16_MAX );
     }
 
     // "0" is reserved to mark "no data" samples, skipped due to probabilistic sampling
@@ -852,6 +853,11 @@ float NRD_SG_ExtractRoughnessAA( NRD_SG sg )
     return sg.sharpness;
 }
 
+void NRD_SG_Rotate( inout NRD_SG sg, float3x3 rotation )
+{
+    sg.c1 = mul( rotation, sg.c1 );
+}
+
 float3 NRD_SG_ResolveDiffuse( NRD_SG sg, float3 N )
 {
     // https://therealmjp.github.io/posts/sg-series-part-3-diffuse-lighting-from-an-sg-light-source/

diff --git a/Shaders/Include/REBLUR/REBLUR_Common_DiffuseSpatialFilter.hlsli b/Shaders/Include/REBLUR/REBLUR_Common_DiffuseSpatialFilter.hlsli
@@ -145,7 +145,7 @@ license agreement from NVIDIA CORPORATION is strictly prohibited.
             w *= GetCombinedWeight( geometryWeightParams, Nv, Xvs, normalWeightParams, N, Ns );
             w *= lerp( minHitDistWeight, 1.0, GetHitDistanceWeight( hitDistanceWeightParams, ExtractHitDist( s ) ) );
 
-            // Get rid of potentially bad values outside of the screen
+            // Get rid of potential NANs outside of rendering rectangle or denoising range
             w = ( IsInScreen( uv ) && !isnan( w ) ) ? w : 0.0;
             s = w != 0.0 ? s : 0.0;
 
@@ -174,12 +174,20 @@ license agreement from NVIDIA CORPORATION is strictly prohibited.
         REBLUR_TYPE s0 = gIn_Diff[ checkerboardPos.xy ];
         REBLUR_TYPE s1 = gIn_Diff[ checkerboardPos.zy ];
 
+        // Get rid of potential NANs outside of rendering rectangle or denoising range
+        s0 = wc.x != 0.0 ? s0 : 0;
+        s1 = wc.y != 0.0 ? s1 : 0;
+
         diff = s0 * wc.x + s1 * wc.y;
 
     #ifdef REBLUR_SH
         float4 sh0 = gIn_DiffSh[ checkerboardPos.xy ];
         float4 sh1 = gIn_DiffSh[ checkerboardPos.zy ];
 
+        // Get rid of potential NANs outside of rendering rectangle or denoising range
+        sh0 = wc.x != 0.0 ? sh0 : 0;
+        sh1 = wc.y != 0.0 ? sh1 : 0;
+
         diffSh = sh0 * wc.x + sh1 * wc.y;
     #endif
     }

diff --git a/Shaders/Include/REBLUR/REBLUR_Common_SpecularSpatialFilter.hlsli b/Shaders/Include/REBLUR/REBLUR_Common_SpecularSpatialFilter.hlsli
@@ -184,7 +184,7 @@ license agreement from NVIDIA CORPORATION is strictly prohibited.
             #endif
         #endif
 
-            // Get rid of potentially bad values outside of the screen
+            // Get rid of potential NANs outside of rendering rectangle or denoising range
             w = ( IsInScreen( uv ) && !isnan( w ) ) ? w : 0.0;
             s = w != 0.0 ? s : 0.0;
 
@@ -222,12 +222,20 @@ license agreement from NVIDIA CORPORATION is strictly prohibited.
         REBLUR_TYPE s0 = gIn_Spec[ checkerboardPos.xy ];
         REBLUR_TYPE s1 = gIn_Spec[ checkerboardPos.zy ];
 
+        // Get rid of potential NANs outside of rendering rectangle or denoising range
+        s0 = wc.x != 0.0 ? s0 : 0;
+        s1 = wc.y != 0.0 ? s1 : 0;
+
         spec = s0 * wc.x + s1 * wc.y;
 
     #ifdef REBLUR_SH
         float4 sh0 = gIn_SpecSh[ checkerboardPos.xy ];
         float4 sh1 = gIn_SpecSh[ checkerboardPos.zy ];
 
+        // Get rid of potential NANs outside of rendering rectangle or denoising range
+        sh0 = wc.x != 0.0 ? sh0 : 0;
+        sh1 = wc.y != 0.0 ? sh1 : 0;
+
         specSh = sh0 * wc.x + sh1 * wc.y;
     #endif
     }

diff --git a/Shaders/Include/REBLUR/REBLUR_DiffuseSpecular_HistoryFix.hlsli b/Shaders/Include/REBLUR/REBLUR_DiffuseSpecular_HistoryFix.hlsli
@@ -156,7 +156,7 @@ NRD_EXPORT void NRD_CS_MAIN( int2 threadPos : SV_GroupThreadId, int2 pixelPos :
 
                     REBLUR_TYPE s = gIn_Diff.SampleLevel( gNearestClamp, uvScaled, 0 );
 
-                    // Get rid of potentially bad values outside of the screen
+                    // Get rid of potential NANs outside of rendering rectangle or denoising range
                     w = IsInScreen( uv ) ? w : 0.0; // no "!isnan" because "s" is not used for "w" calculations
                     s = w != 0.0 ? s : 0.0;
 
@@ -218,7 +218,10 @@ NRD_EXPORT void NRD_CS_MAIN( int2 threadPos : SV_GroupThreadId, int2 pixelPos :
                     if( abs( i ) <= 1 && abs( j ) <= 1 )
                         continue;
 
-                    float d = gIn_DiffFast.SampleLevel( gNearestClamp, pixelUv + int2( i, j ) * gInvRectSize, 0 ).x;
+                    float2 uv = pixelUv + float2( i, j ) * gInvRectSize;
+                    float2 uvScaled = uv * gResolutionScale;
+
+                    float d = gIn_DiffFast.SampleLevel( gNearestClamp, uvScaled, 0 ).x;
                     m1 += d;
                     m2 += d * d;
                 }
@@ -346,7 +349,7 @@ NRD_EXPORT void NRD_CS_MAIN( int2 threadPos : SV_GroupThreadId, int2 pixelPos :
                     // It allows bleeding of background to foreground, but not vice versa ( doesn't suit for 0 roughness )
                     w *= saturate( 1.0 - hitDistWeightScale * abs( ExtractHitDist( s ) - hitDistNormAtCenter ) / ( max( ExtractHitDist( s ), hitDistNormAtCenter ) + NRD_EPS ) );
 
-                    // Get rid of potentially bad values outside of the screen
+                    // Get rid of potential NANs outside of rendering rectangle or denoising range
                     w = ( IsInScreen( uv ) && !isnan( w ) ) ? w : 0.0;
                     s = w != 0.0 ? s : 0.0;
 
@@ -408,7 +411,10 @@ NRD_EXPORT void NRD_CS_MAIN( int2 threadPos : SV_GroupThreadId, int2 pixelPos :
                     if( abs( i ) <= 1 && abs( j ) <= 1 )
                         continue;
 
-                    float s = gIn_SpecFast.SampleLevel( gNearestClamp, pixelUv + int2( i, j ) * gInvRectSize, 0 ).x;
+                    float2 uv = pixelUv + float2( i, j ) * gInvRectSize;
+                    float2 uvScaled = uv * gResolutionScale;
+
+                    float s = gIn_SpecFast.SampleLevel( gNearestClamp, uvScaled, 0 ).x;
                     m1 += s;
                     m2 += s * s;
                 }

diff --git a/Shaders/Include/REBLUR/REBLUR_DiffuseSpecular_HitDistReconstruction.hlsli b/Shaders/Include/REBLUR/REBLUR_DiffuseSpecular_HitDistReconstruction.hlsli
@@ -38,6 +38,9 @@ void Preload( uint2 sharedPos, int2 globalPos )
         #endif
     #endif
 
+    // Get rid of potential NANs outside of rendering rectangle or denoising range
+    hitDist = viewZ > gDenoisingRange ? 0 : hitDist;
+
     s_HitDist_ViewZ[ sharedPos.y ][ sharedPos.x ] = float3( hitDist, viewZ );
 }
-Original file line number
+Diff line change
@@ Expand Up / @@ -38,6 +38,9 @@ void Preload( uint2 sharedPos, int2 globalPos ) @@
             #endif
         #endif
+        // Get rid of potential NANs outside of rendering rectangle or denoising range
+        hitDist = viewZ > gDenoisingRange ? 0 : hitDist;
         s_HitDist_ViewZ[ sharedPos.y ][ sharedPos.x ] = float3( hitDist, viewZ );
     }
@@ Expand Down @@