From 0a224d62a8d00cf529efa8a4c2b9a6c3bd5293c3 Mon Sep 17 00:00:00 2001
From: Trevor Black <trevor.black@intel.com>
Date: Wed, 18 Sep 2019 15:27:14 -0700
Subject: [PATCH] Fixes pexm_z as perm_z. Resolves #196

---
 books/RayTracingTheNextWeek.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/books/RayTracingTheNextWeek.html b/books/RayTracingTheNextWeek.html
index 29a6b18e..490a8498 100644
--- a/books/RayTracingTheNextWeek.html
+++ b/books/RayTracingTheNextWeek.html
@@ -1104,7 +1104,7 @@
                             c[di][dj][dk] = ranfloat[
                                 perm_x[(i+di) & 255] ^
                                 perm_y[(j+dj) & 255] ^
-                                pexm_z[(k+dk) & 255]
+                                perm_z[(k+dk) & 255]
                             ];
                 return trilinear_interp(c, u, v, w);
             }