diff --git a/Resources/SkyAtmosphereBruneton.hlsl b/Resources/SkyAtmosphereBruneton.hlsl
index 719a383..4f8c69d 100644
--- a/Resources/SkyAtmosphereBruneton.hlsl
+++ b/Resources/SkyAtmosphereBruneton.hlsl
@@ -95,6 +95,8 @@ cbuffer SKYATMOSPHERE_BUFFER : register(b1)
 	//
 	float4x4 gSkyViewProjMat;
 	float4x4 gSkyInvViewProjMat;
+	float4x4 gSkyInvProjMat;
+	float4x4 gSkyInvViewMat;
 	float4x4 gShadowmapViewProjMat;
 
 	float3 camera;
@@ -103,6 +105,12 @@ cbuffer SKYATMOSPHERE_BUFFER : register(b1)
 	float  pad6;
 	float3 view_ray;
 	float  pad7;
+
+	// not used in Bruneton model
+	float MultipleScatteringFactor;
+	float MultiScatteringLUTRes;
+	float pad9;
+	float pad10;
 };
 
 cbuffer SKYATMOSPHERE_SIDE_BUFFER : register(b2)