From 1030cea64b342057f96e4e1dfb03df75d8397c2d Mon Sep 17 00:00:00 2001
From: doodlum <15017472+doodlum@users.noreply.github.com>
Date: Sat, 13 Sep 2025 01:09:23 +0100
Subject: [PATCH] chore: improve contrast function

---
 package/Shaders/ISHDR.hlsl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/package/Shaders/ISHDR.hlsl b/package/Shaders/ISHDR.hlsl
index f61cd82c02..52b80ab175 100644
--- a/package/Shaders/ISHDR.hlsl
+++ b/package/Shaders/ISHDR.hlsl
@@ -116,7 +116,9 @@ PS_OUTPUT main(PS_INPUT input)
 
 	hdrColor += DisplayMapping::RangeCompress(max(0, Param.x - hdrColor)) * bloomColor;
 
-	hdrColor = pow(abs(hdrColor) / avgValue.x, Cinematic.z) * avgValue.x * sign(hdrColor);
+	float3 contrastOriginal = lerp(avgValue.x, hdrColor, Cinematic.z);
+	float3 contrastShadows = pow(abs(hdrColor) / avgValue.x, Cinematic.z) * avgValue.x * sign(hdrColor);
+	hdrColor = contrastOriginal < hdrColor ? contrastShadows : contrastOriginal;
 
 	float hdrLuminance = Color::RGBToLuminance(hdrColor);
 	hdrColor = Cinematic.w * lerp(lerp(hdrLuminance, hdrColor, Cinematic.x), lerp(hdrColor, hdrLuminance, saturate(hdrLuminance)) * Tint.xyz, Tint.w).xyz;