diff --git a/cmuratori/hero/code/code432.hmml b/cmuratori/hero/code/code432.hmml
index e830fd3..fe10fbb 100644
--- a/cmuratori/hero/code/code432.hmml
+++ b/cmuratori/hero/code/code432.hmml
@@ -24,21 +24,21 @@
 [42:30][:Run the game and crash in ComputeLightPropagation()][:lighting :optimisation :rendering]
 [44:45][Step in to GetBox() to see that our BoxIndex is busted][:lighting :optimisation :rendering :run]
 [46:33][Step through RayCast() to see what's happening][:lighting :optimisation :rendering :run]
-[49:46][Make RayCast() actually set the BoxIndex and BoxSurfaceIndex][:lighting :optimisation :owl :rendering]
+[49:46][Make RayCast() actually set the BoxIndex and BoxSurfaceIndex][:lighting :optimisation :owl :programming :rendering]
 [50:55][:Run the game with the selection happening][:lighting :optimisation :owl :performance :rendering]
-[51:09][Make RayCast() set the RayP in SIMD using a v3_4x version of Select()][:lighting :optimisation :owl :rendering]
+[51:09][Make RayCast() set the RayP in SIMD using a v3_4x version of Select()][:lighting :optimisation :owl :programming :rendering]
 [53:38][:Run the game to see that we are down to \~26ms][:lighting :optimisation :owl :performance :rendering]
-[54:22][Add a TIMED_FUNCTION() in RayCast()][:lighting :optimisation :owl :rendering]
+[54:22][Add a TIMED_FUNCTION() in RayCast()][:lighting :optimisation :owl :programming :rendering]
 [54:41][:Run the game to consult the profiler][:lighting :optimisation :owl :performance :rendering]
-[54:55][Add a TIMED_BLOCK() around the startup code in RayCast()][:lighting :optimisation :owl :rendering]
+[54:55][Add a TIMED_BLOCK() around the startup code in RayCast()][:lighting :optimisation :owl :programming :rendering]
 [55:35][:Run the game and consult the profiler to see that the startup cost is not high][:lighting :optimisation :owl :performance :rendering]
-[56:00][Perform SampleHemisphere() in SIMD][:lighting :optimisation :owl :rendering :statistics]
-[1:01:22][:Run the game to see that we're down to 22ms per frame]
-[1:02:04][Temporarily make SampleHemisphere() use complete randomisation][:lighting :optimisation :owl :rendering :statistics]
+[56:00][Perform SampleHemisphere() in SIMD][:lighting :optimisation :owl :programming :rendering :statistics]
+[1:01:22][:Run the game to see that we're down to 22ms per frame][:lighting :optimisation :owl :performance :rendering]
+[1:02:04][Temporarily make SampleHemisphere() use complete randomisation][:lighting :optimisation :owl :programming :rendering :statistics]
 [1:02:20][:Run the game to see that this would put us back up to 30ms per frame, and note why][:lighting :optimisation :owl :performance :rendering :statistics]
-[1:04:08][Drop the RayCount down to 4 in ComputeLightPropagation()][:lighting :optimisation :owl :rendering]
+[1:04:08][Drop the RayCount down to 4 in ComputeLightPropagation()][:lighting :optimisation :owl :programming :rendering]
 [1:04:25][:Run the game and unexpectedly see no speed improvement][:lighting :optimisation :owl :rendering :run]
-[1:05:45][Remove variable suffixes in RayCast()][:lighting :optimisation :owl :rendering]
+[1:05:45][Remove variable suffixes in RayCast()][:lighting :optimisation :owl :programming :rendering]
 [1:08:55][Consider removing the Depth loop in RayCast() and reposition the AnyTrue(Mask) test][:lighting :optimisation :rendering]
 [1:10:31][:Run the game and consider where to go from here][:lighting :optimisation :rendering]
 [1:11:25][Inspect the assembly of RayCast()][:asm :lighting :optimisation :rendering]