diff --git a/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5001_PathTracing.png b/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5001_PathTracing.png
index 38aa3b7635d..42836bef2d4 100644
--- a/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5001_PathTracing.png
+++ b/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5001_PathTracing.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:a3895661050aac74184f0828cbedeadd6344b378ef97c7c1d638afb68956245c
-size 602331
+oid sha256:c41d3240cc1a61873e44b11f3727b02b0796b9a15a21ad28e1b072c3cf53ba30
+size 594955
diff --git a/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5003_PathTracing_transparency.png b/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5003_PathTracing_transparency.png
index 8e108fcf9d7..d373862e147 100644
--- a/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5003_PathTracing_transparency.png
+++ b/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5003_PathTracing_transparency.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:0cbcabf92bd1e0b92be8ecd9bbb0f15b6f80360506edfd255407bab4c6d70942
-size 816576
+oid sha256:94b15e3f04fea302b44fc24973c3271fb93cc193ebf512e5c66783eccf5af478
+size 816378
diff --git a/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5004_PathTracing_arealight.png b/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5004_PathTracing_arealight.png
index ba07a88d5f6..f1ba4805c13 100644
--- a/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5004_PathTracing_arealight.png
+++ b/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5004_PathTracing_arealight.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:97af6b6b524474fd78fef8d2d50c4dafebd6f45b49f5c598669311fcb291b03b
-size 175997
+oid sha256:4a812bb84d35db5575a730bf753959063c30fb21921a003cb988e2aa4cd711e2
+size 171136
diff --git a/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5006_PathTracing_DoF.png b/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5006_PathTracing_DoF.png
index b3b1fcf58a8..9ce3911c7b6 100644
--- a/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5006_PathTracing_DoF.png
+++ b/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5006_PathTracing_DoF.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:aff5b5bfea6fafd52bb2a32bacb7dfbddfaec62937c616706da6770e95496a3a
-size 583942
+oid sha256:293a4b4420f4ff33b083bae34a3b9bff853b3b29e5d06a9308aa365781280882
+size 582743
diff --git a/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5007_PathTracing_Materials_SG_Lit.png b/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5007_PathTracing_Materials_SG_Lit.png
index c8cbc803c52..3ab8e3d69dc 100644
--- a/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5007_PathTracing_Materials_SG_Lit.png
+++ b/TestProjects/HDRP_DXR_Tests/Assets/ReferenceImages/Linear/WindowsEditor/Direct3D12/None/5007_PathTracing_Materials_SG_Lit.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:58698111dd23aae471a3872331d06c0cd9db5b33015b8e8dcb56cb69ef337a85
-size 556660
+oid sha256:c5b765dace74f6bdd1005f95800e3f7680f3c8c3b6f50936da14f2c5d41f146d
+size 509269
diff --git a/com.unity.render-pipelines.high-definition/CHANGELOG.md b/com.unity.render-pipelines.high-definition/CHANGELOG.md
index 6228fc388ff..6a02f00486a 100644
--- a/com.unity.render-pipelines.high-definition/CHANGELOG.md
+++ b/com.unity.render-pipelines.high-definition/CHANGELOG.md
@@ -794,6 +794,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - DXR: Dispatch binned rays in 1D instead of 2D.
 - Lit and LayeredLit tessellation cross lod fade don't used dithering anymore between LOD but fade the tessellation height instead. Allow a smoother transition
 - Changed the way planar reflections are filtered in order to be a bit more "physically based".
+- Increased path tracing BSDFs roughness range from [0.001, 0.999] to [0.00001, 0.99999].
 
 ## [7.1.1] - 2019-09-05
 
diff --git a/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/PathTracing/Shaders/PathTracingBSDF.hlsl b/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/PathTracing/Shaders/PathTracingBSDF.hlsl
index 9ae7e4bcd8c..526b983bb9f 100644
--- a/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/PathTracing/Shaders/PathTracingBSDF.hlsl
+++ b/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/PathTracing/Shaders/PathTracingBSDF.hlsl
@@ -4,8 +4,8 @@
 #include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/Raytracing/Shaders/SubSurface.hlsl"
 
 #define DELTA_PDF 1000000.0
-#define MIN_GGX_ROUGHNESS 0.001
-#define MAX_GGX_ROUGHNESS 0.999
+#define MIN_GGX_ROUGHNESS 0.00001
+#define MAX_GGX_ROUGHNESS 0.99999
 
 // Adapted from: "Sampling the GGX Distribution of Visible Normals", by E. Heitz
 // http://jcgt.org/published/0007/04/01/paper.pdf
diff --git a/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/PathTracing/Shaders/PathTracingMain.raytrace b/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/PathTracing/Shaders/PathTracingMain.raytrace
index c1d8da2604e..e38166d52a7 100644
--- a/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/PathTracing/Shaders/PathTracingMain.raytrace
+++ b/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/PathTracing/Shaders/PathTracingMain.raytrace
@@ -108,7 +108,7 @@ void RayGen()
     pathIntersection.value = 1.0;
     pathIntersection.remainingDepth = _RaytracingMaxRecursion;
     pathIntersection.pixelCoord = currentPixelCoord;
-    pathIntersection.maxRoughness = 0.001;
+    pathIntersection.maxRoughness = 0.0;
 
     // In order to achieve filtering for the textures, we need to compute the spread angle of the pixel
     pathIntersection.cone.spreadAngle = _RaytracingPixelSpreadAngle;