From aec4978ca986ec923fde74f0013d4bf48288f866 Mon Sep 17 00:00:00 2001
From: "C. S." <76898260+Pentalimbed@users.noreply.github.com>
Date: Thu, 15 Aug 2024 02:37:27 +0100
Subject: [PATCH] fix: ssgi use perceptual roughness instead of linear (#418)

---
 features/Screen Space GI/Shaders/ScreenSpaceGI/gi.cs.hlsl | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/features/Screen Space GI/Shaders/ScreenSpaceGI/gi.cs.hlsl b/features/Screen Space GI/Shaders/ScreenSpaceGI/gi.cs.hlsl
index e2a16d8fc..b15359ea6 100644
--- a/features/Screen Space GI/Shaders/ScreenSpaceGI/gi.cs.hlsl	
+++ b/features/Screen Space GI/Shaders/ScreenSpaceGI/gi.cs.hlsl	
@@ -117,8 +117,7 @@ void CalculateGI(
 	float3 bentNormal = viewspaceNormal;
 
 #ifdef GI_SPECULAR
-	const float roughness2 = max(0.04, saturate(1 - FULLRES_LOAD(srcNormalRoughness, dtid, uv * frameScale, samplerLinearClamp).z));  // can't handle low roughness
-	const float roughness = sqrt(roughness2);
+	const float roughness = max(0.2, saturate(1 - FULLRES_LOAD(srcNormalRoughness, dtid, uv * frameScale, samplerLinearClamp).z));  // can't handle low roughness
 #endif
 
 	for (uint slice = 0; slice < NumSlices; slice++) {