Cleanup: spelling

2 files changed, 3 insertions, 3 deletions

diff --git a/intern/cycles/kernel/kernel_light.h b/intern/cycles/kernel/kernel_light.h
index 138b90373a6..9650b85a5c2 100644
--- a/intern/cycles/kernel/kernel_light.h
+++ b/intern/cycles/kernel/kernel_light.h
@@ -582,7 +582,7 @@ ccl_device_forceinline void triangle_light_sample(KernelGlobals *kg,
 
 ccl_device int light_distribution_sample(KernelGlobals *kg, float *randu)
 {
-  /* This is basically std::upper_bound as used by pbrt, to find a point light or
+  /* This is basically std::upper_bound as used by PBRT, to find a point light or
    * triangle to emit from, proportional to area. a good improvement would be to
    * also sample proportional to power, though it's not so well defined with
    * arbitrary shaders. */
diff --git a/intern/cycles/kernel/kernel_light_background.h b/intern/cycles/kernel/kernel_light_background.h
index 5fa25069fcd..2a685c0adfa 100644
--- a/intern/cycles/kernel/kernel_light_background.h
+++ b/intern/cycles/kernel/kernel_light_background.h
@@ -31,7 +31,7 @@ ccl_device float3 background_map_sample(KernelGlobals *kg, float randu, float ra
   int res_y = kernel_data.background.map_res_y;
   int cdf_width = res_x + 1;
 
-  /* this is basically std::lower_bound as used by pbrt */
+  /* This is basically std::lower_bound as used by PBRT. */
   int first = 0;
   int count = res_y;
 
@@ -58,7 +58,7 @@ ccl_device float3 background_map_sample(KernelGlobals *kg, float randu, float ra
   float dv = inverse_lerp(cdf_v.y, cdf_next_v.y, randv);
   float v = (index_v + dv) / res_y;
 
-  /* this is basically std::lower_bound as used by pbrt */
+  /* This is basically std::lower_bound as used by PBRT. */
   first = 0;
   count = res_x;
   while (count > 0) {