diff --git a/com.unity.render-pipelines.high-definition/CHANGELOG.md b/com.unity.render-pipelines.high-definition/CHANGELOG.md
index 7e646dfa567..3c67cfcb0e8 100644
--- a/com.unity.render-pipelines.high-definition/CHANGELOG.md
+++ b/com.unity.render-pipelines.high-definition/CHANGELOG.md
@@ -152,6 +152,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed broken Lanczos filter artifacts on ps4, caused by a very aggressive epsilon (case 1328904)
 - Fixed global Settings ignore the path set via Fix All in HDRP wizard (case 1327978)
 - Fixed GBuffer clear option in FrameSettings not working
+- Fixed usage of Panini Projection with floating point HDRP and Post Processing color buffers.
 
 ### Changed
 - Changed Window/Render Pipeline/HD Render Pipeline Wizard to Window/Rendering/HDRP Wizard
diff --git a/com.unity.render-pipelines.high-definition/Runtime/PostProcessing/Shaders/PaniniProjection.compute b/com.unity.render-pipelines.high-definition/Runtime/PostProcessing/Shaders/PaniniProjection.compute
index e1f03a8a5c8..bf637fd8e1f 100644
--- a/com.unity.render-pipelines.high-definition/Runtime/PostProcessing/Shaders/PaniniProjection.compute
+++ b/com.unity.render-pipelines.high-definition/Runtime/PostProcessing/Shaders/PaniniProjection.compute
@@ -1,15 +1,17 @@
 #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
 #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"
+#include "Packages/com.unity.render-pipelines.high-definition/Runtime/PostProcessing/Shaders/PostProcessDefines.hlsl"
 
 #pragma only_renderers d3d11 playstation xboxone xboxseries vulkan metal switch
 
 #pragma kernel KMain
 
 #pragma multi_compile GENERIC UNITDISTANCE
+#pragma multi_compile _ ENABLE_ALPHA
 
 TEXTURE2D_X(_InputTexture);
 
-RW_TEXTURE2D_X(float3, _OutputTexture);
+RW_TEXTURE2D_X(CTYPE, _OutputTexture);
 
 SAMPLER(sampler_LinearClamp);
 
@@ -125,7 +127,7 @@ void KMain(uint3 dispatchThreadId : SV_DispatchThreadID)
     }
     else
     {
-        float3 smp = SAMPLE_TEXTURE2D_X_LOD(_InputTexture, sampler_LinearClamp, ClampAndScaleUVForBilinear(coords), 0.0).xyz;
+        CTYPE smp = SAMPLE_TEXTURE2D_X_LOD(_InputTexture, sampler_LinearClamp, ClampAndScaleUVForBilinear(coords), 0.0).CTYPE_SWIZZLE;
         _OutputTexture[COORD_TEXTURE2D_X(posInputs.positionSS)] = smp;
     }
 }
diff --git a/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipeline.PostProcess.cs b/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipeline.PostProcess.cs
index 9e68add632c..8a364795a1a 100644
--- a/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipeline.PostProcess.cs
+++ b/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipeline.PostProcess.cs
@@ -3019,6 +3019,9 @@ TextureHandle PaniniProjectionPass(RenderGraph renderGraph, HDCamera hdCamera, T
                     else
                         passData.paniniProjectionCS.EnableKeyword("UNITDISTANCE");
 
+                    if (m_EnableAlpha)
+                        passData.paniniProjectionCS.EnableKeyword("ENABLE_ALPHA");
+
                     passData.paniniParams = new Vector4(viewExtents.x, viewExtents.y, paniniD, paniniS);
                     passData.paniniProjectionKernel = passData.paniniProjectionCS.FindKernel("KMain");