diff --git a/src/Orange/Render/Shaders/fs_HDRTest.frag b/src/Orange/Render/Shaders/fs_HDRTest.frag
index 81eeb11..3bd11dc 100644
--- a/src/Orange/Render/Shaders/fs_HDRTest.frag
+++ b/src/Orange/Render/Shaders/fs_HDRTest.frag
@@ -125,19 +125,28 @@ void main()
     {
         // PQ (10 bits)   PQ (normalize)   nits
         // 520 0.5083088954056696 100.229885531
-        outColor = vec4(vec3(0.5083088954056696), 1.0f);
+        if (gl_FragCoord.x >= 1280 / 3 && gl_FragCoord.x <= 1280 * 2 / 3 && gl_FragCoord.y >= 720 / 3 && gl_FragCoord.y <= 720 * 2 / 3)
+            outColor = vec4(vec3(0.5083088954056696), 1.0f);
+        else
+            outColor = vec4(0.0f, 0.0f, 0.0f, 1.0f);
     }
     else if (test == nextTest++)
     {
         // PQ (10 bits)   PQ (normalize)   nits
         // 692 0.6764418377321603 499.337816742
-        outColor = vec4(vec3(0.6764418377321603), 1.0f);
+        if (gl_FragCoord.x >= 1280 / 3 && gl_FragCoord.x <= 1280 * 2 / 3 && gl_FragCoord.y >= 720 / 3 && gl_FragCoord.y <= 720 * 2 / 3)
+            outColor = vec4(vec3(0.6764418377321603), 1.0f);
+        else
+            outColor = vec4(0.0f, 0.0f, 0.0f, 1.0f);
     }
     else if (test == nextTest++)
     {
         // PQ (10 bits)   PQ (normalize)   nits
         // 769 0.7517106549364614 998.932391045
-        outColor = vec4(vec3(0.7517106549364614), 1.0f);
+        if (gl_FragCoord.x >= 1280 / 3 && gl_FragCoord.x <= 1280 * 2 / 3 && gl_FragCoord.y >= 720 / 3 && gl_FragCoord.y <= 720 * 2 / 3)
+            outColor = vec4(vec3(0.7517106549364614), 1.0f);
+        else
+            outColor = vec4(0.0f, 0.0f, 0.0f, 1.0f);
     }
     else if (test == nextTest++)
     {