From 5925dae3a6df37e07255c4e446644c918c9ad7d0 Mon Sep 17 00:00:00 2001
From: assiduous <assiduous@diligentgraphics.com>
Date: Mon, 13 May 2024 21:13:34 -0700
Subject: [PATCH] PBR Renderer: use float3 for IBL scale

---
 Shaders/PBR/private/RenderPBR.psh     | 2 +-
 Shaders/PBR/public/PBR_Shading.fxh    | 2 +-
 Shaders/PBR/public/PBR_Structures.fxh | 6 ++++--
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/Shaders/PBR/private/RenderPBR.psh b/Shaders/PBR/private/RenderPBR.psh
index 1293fa12..7db1b59e 100644
--- a/Shaders/PBR/private/RenderPBR.psh
+++ b/Shaders/PBR/private/RenderPBR.psh
@@ -283,7 +283,7 @@ SurfaceShadingInfo GetSurfaceShadingInfo(in VSOutput              VSOut,
     Shading.Occlusion = GetOcclusion(VSOut, Material, g_Frame.Renderer.MipBias);
     Shading.Emissive  = GetEmissive(VSOut, Material, g_Frame.Renderer.MipBias);
 
-    Shading.IBLScale  = g_Frame.Renderer.IBLScale;
+    Shading.IBLScale  = g_Frame.Renderer.IBLScale.rgb;
     Shading.Occlusion = lerp(1.0, Shading.Occlusion, g_Frame.Renderer.OcclusionStrength);
     Shading.Emissive *= g_Frame.Renderer.EmissionScale;
 
diff --git a/Shaders/PBR/public/PBR_Shading.fxh b/Shaders/PBR/public/PBR_Shading.fxh
index 51803f32..21921177 100644
--- a/Shaders/PBR/public/PBR_Shading.fxh
+++ b/Shaders/PBR/public/PBR_Shading.fxh
@@ -557,7 +557,7 @@ struct SurfaceShadingInfo
     float VolumeThickness;
 #endif
     
-    float IBLScale;
+    float3 IBLScale;
 };
 
 struct LayerLightingInfo
diff --git a/Shaders/PBR/public/PBR_Structures.fxh b/Shaders/PBR/public/PBR_Structures.fxh
index 8181fbce..c9a999da 100644
--- a/Shaders/PBR/public/PBR_Structures.fxh
+++ b/Shaders/PBR/public/PBR_Structures.fxh
@@ -79,15 +79,17 @@ struct PBRRendererShaderParameters
     float WhitePoint;
 	float PrefilteredCubeLastMip; // Prefiltered cube map last mip level
 
-	float IBLScale;
+	float4 IBLScale;
+
     float OcclusionStrength;
     float EmissionScale;
     float PointSize; // OpenGL and Vulkan
-
     float MipBias;
+
     int   LightCount;
     float Padding0;
     float Padding1;
+    float Padding2;
     
     float4 UnshadedColor;
     float4 HighlightColor;