From 6ca53a53292ed252ea8b3701aa541457b74a2e31 Mon Sep 17 00:00:00 2001
From: Cat Flynn <me@ktyl.dev>
Date: Sun, 26 Feb 2023 03:28:26 +0000
Subject: [PATCH] apply gamma correction

---
 shader/root/rt.glsl | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/shader/root/rt.glsl b/shader/root/rt.glsl
index c081533..34de0c3 100644
--- a/shader/root/rt.glsl
+++ b/shader/root/rt.glsl
@@ -99,6 +99,13 @@ void main()
         depth += sampleDepth / float(samples);
     }
 
+
+    // include the first sample we took
+    samples++;
+    // gamma correction
+    float scale = 1.0 / samples;
+    pixel.xyz = sqrt(scale * pixel.xyz);
+
     pixel.xyz = mix(pixel.xyz, vec3(1.0), depth);
 
     // output to a specific pixel in the image