diff --git a/src/Orange/Render/Shaders/fs_HDRTest.frag b/src/Orange/Render/Shaders/fs_HDRTest.frag
index 4df204c..323ac66 100644
--- a/src/Orange/Render/Shaders/fs_HDRTest.frag
+++ b/src/Orange/Render/Shaders/fs_HDRTest.frag
@@ -133,7 +133,7 @@ void main()
     {
         const float seed = fract(time);
 
-        vec3 value = vec3(gold_noise(coords.xy, seed + 0.2));
+        vec3 value = vec3(gold_noise(gl_FragCoord.xy, seed + 0.2)) * targetNits;
 
         outColor = vec4(nitsToPq(value), 1.0);
     }
@@ -141,7 +141,10 @@ void main()
     {
         const float seed = fract(time);
 
-        vec3 value = vec3(gold_noise(coords.xy, seed + 0.1), gold_noise(coords.xy, seed + 0.2), gold_noise(coords.xy, seed + 0.2));
+        vec3 value = vec3(
+            gold_noise(gl_FragCoord.xy, seed + 0.1),
+            gold_noise(gl_FragCoord.xy, seed + 0.2),
+            gold_noise(gl_FragCoord.xy, seed + 0.2)) * targetNits;
 
         outColor = vec4(nitsToPq(value), 1.0);
     }