diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5092c2c..35d41e5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,8 @@ and this project adheres to
 - Fixed bug where sky was shown a second time outside field of view with
   equidistant and equal area camera projections
 - Fixed missing prism face distances from save files
+- Fixed bug with slightly incorrect crystal geometry causing uneven brightness
+  distribution with Parry crystal halos
 
 ## 3.2.0 - 2021-03-24
 
diff --git a/src/haloray-core/resources/shaders/raytrace.glsl b/src/haloray-core/resources/shaders/raytrace.glsl
index 20da1b8..1d63cb8 100644
--- a/src/haloray-core/resources/shaders/raytrace.glsl
+++ b/src/haloray-core/resources/shaders/raytrace.glsl
@@ -130,11 +130,11 @@ ivec3 triangles[] = ivec3[](
     ivec3(15, 16, 10),
 
     // Face 7 (prism)
-    ivec3(10, 16, 17),
+    ivec3(10, 16, 11),
     ivec3(16, 17, 11),
 
     // Face 8 (prism)
-    ivec3(11, 17, 12),
+    ivec3(11, 17, 6),
     ivec3(17, 12, 6)
 );