diff --git a/Gems/Atom/Feature/Common/Assets/ShaderResourceGroups/CoreLights/ViewSrg.azsli b/Gems/Atom/Feature/Common/Assets/ShaderResourceGroups/CoreLights/ViewSrg.azsli
index aeb57259e7..7a51d4c629 100644
--- a/Gems/Atom/Feature/Common/Assets/ShaderResourceGroups/CoreLights/ViewSrg.azsli
+++ b/Gems/Atom/Feature/Common/Assets/ShaderResourceGroups/CoreLights/ViewSrg.azsli
@@ -73,7 +73,8 @@ partial ShaderResourceGroup ViewSrg
         float m_invAttenuationRadiusSquared; // For a radius at which this light no longer has an effect, 1 / radius^2.
         float3 m_rgbIntensityCandelas;
         float m_bulbRadius;
-        uint4 m_shadowIndices;
+        uint3 m_shadowIndices;
+        uint m_padding;
     };
 
     StructuredBuffer<PointLight> m_pointLights;
diff --git a/Gems/Atom/Feature/Common/Assets/ShaderResourceGroups/RayTracingSceneSrg.azsli b/Gems/Atom/Feature/Common/Assets/ShaderResourceGroups/RayTracingSceneSrg.azsli
index 2bccee4902..2ae74466d6 100644
--- a/Gems/Atom/Feature/Common/Assets/ShaderResourceGroups/RayTracingSceneSrg.azsli
+++ b/Gems/Atom/Feature/Common/Assets/ShaderResourceGroups/RayTracingSceneSrg.azsli
@@ -63,7 +63,8 @@ partial ShaderResourceGroup RayTracingSceneSrg
         float  m_invAttenuationRadiusSquared;
         float3 m_rgbIntensity;
         float  m_bulbRadius;
-        uint4 m_shadowIndices;
+        uint3 m_shadowIndices;
+        uint m_padding;
     };
     
     StructuredBuffer<PointLight> m_pointLights;
diff --git a/Gems/Atom/Feature/Common/Assets/Shaders/LightCulling/LightCulling.azsl b/Gems/Atom/Feature/Common/Assets/Shaders/LightCulling/LightCulling.azsl
index 41b42ca68b..0327a723d6 100644
--- a/Gems/Atom/Feature/Common/Assets/Shaders/LightCulling/LightCulling.azsl
+++ b/Gems/Atom/Feature/Common/Assets/Shaders/LightCulling/LightCulling.azsl
@@ -59,7 +59,8 @@ ShaderResourceGroup PassSrg : SRG_PerPass
         float m_invAttenuationRadiusSquared; // For a radius at which this light no longer has an effect, 1 / radius^2.
         float3 m_rgbIntensityCandelas;
         float m_bulbRadius;
-        uint4 m_shadowIndices;
+        uint3 m_shadowIndices;
+        uint m_padding;
     };
 
     struct DiskLight