diff --git a/Data/Sys/Shaders/PerceptualHDR.glsl b/Data/Sys/Shaders/PerceptualHDR.glsl
index eed5ec9235..e6d2277fd7 100644
--- a/Data/Sys/Shaders/PerceptualHDR.glsl
+++ b/Data/Sys/Shaders/PerceptualHDR.glsl
@@ -5,7 +5,7 @@
 GUIName = Amplificiation
 OptionName = AMPLIFICATION
 MinValue = 1.0
-MaxValue = 10.0
+MaxValue = 6.0
 StepAmount = 0.25
 DefaultValue = 2.5
 
@@ -119,8 +119,8 @@ void main()
     //
     // For more information, see this desmos demonstrating this scaling process:
     // https://www.desmos.com/calculator/syjyrjsj5c
-    const float luminance = ictcp_color.x;
-    ictcp_color *= pow(HLG_f(AMPLIFICATION), luminance);
+    float exposure = length(ictcp_color.xyz);
+    ictcp_color *= pow(HLG_f(AMPLIFICATION), exposure);
 
     // Convert back to Linear RGB and output the color to the display.
     // We use hdr_paper_white to renormalize the color to the comfortable