Cleanup: correct spelling in comments

54 files changed, 78 insertions, 78 deletions

diff --git a/intern/cycles/app/cycles_cubin_cc.cpp b/intern/cycles/app/cycles_cubin_cc.cpp
index 7631cb9bed5..e5d256dd113 100644
--- a/intern/cycles/app/cycles_cubin_cc.cpp
+++ b/intern/cycles/app/cycles_cubin_cc.cpp
@@ -103,7 +103,7 @@ static bool compile_cuda(CompilationSettings &settings)
     return false;
   }
 
-  /* Tranfer options to a classic C array. */
+  /* Transfer options to a classic C array. */
   vector<const char *> opts(options.size());
   for (size_t i = 0; i < options.size(); i++) {
     opts[i] = options[i].c_str();
diff --git a/intern/cycles/blender/blender_particles.cpp b/intern/cycles/blender/blender_particles.cpp
index d5dd7215c47..ae43dae4dc1 100644
--- a/intern/cycles/blender/blender_particles.cpp
+++ b/intern/cycles/blender/blender_particles.cpp
@@ -31,7 +31,7 @@ bool BlenderSync::sync_dupli_particle(BL::Object &b_ob,
                                       BL::DepsgraphObjectInstance &b_instance,
                                       Object *object)
 {
-  /* test if this dupli was generated from a particle sytem */
+  /* Test if this dupli was generated from a particle system. */
   BL::ParticleSystem b_psys = b_instance.particle_system();
   if (!b_psys)
     return false;
diff --git a/intern/cycles/blender/blender_session.h b/intern/cycles/blender/blender_session.h
index 68db8a2fb58..d967b81c854 100644
--- a/intern/cycles/blender/blender_session.h
+++ b/intern/cycles/blender/blender_session.h
@@ -136,7 +136,7 @@ class BlenderSession {
 
   /* ** Resumable render ** */
 
-  /* Overall number of chunks in which the sample range is to be devided. */
+  /* Overall number of chunks in which the sample range is to be divided. */
   static int num_resumable_chunks;
 
   /* Current resumable chunk index to render. */
diff --git a/intern/cycles/blender/blender_sync.cpp b/intern/cycles/blender/blender_sync.cpp
index 4bcadab35a1..aea601480bf 100644
--- a/intern/cycles/blender/blender_sync.cpp
+++ b/intern/cycles/blender/blender_sync.cpp
@@ -942,7 +942,7 @@ SessionParams BlenderSync::get_session_params(BL::RenderEngine &b_engine,
   else if (shadingsystem == 1)
     params.shadingsystem = SHADINGSYSTEM_OSL;
 
-  /* color managagement */
+  /* Color management. */
   params.display_buffer_linear = b_engine.support_display_space_shader(b_scene);
 
   if (b_engine.is_preview()) {
diff --git a/intern/cycles/bvh/bvh_build.cpp b/intern/cycles/bvh/bvh_build.cpp
index 1727082b7ec..296f9130f43 100644
--- a/intern/cycles/bvh/bvh_build.cpp
+++ b/intern/cycles/bvh/bvh_build.cpp
@@ -703,7 +703,7 @@ BVHNode *BVHBuild::build_node(const BVHRange &range,
     unalignedSplitSAH = params.sah_node_cost * unaligned_split.bounds.half_area() +
                         params.sah_primitive_cost * unaligned_split.nodeSAH;
     /* TOOD(sergey): Check we can create leaf already. */
-    /* Check whether unaligned split is better than the regulat one. */
+    /* Check whether unaligned split is better than the regular one. */
     if (unalignedSplitSAH < splitSAH) {
       do_unalinged_split = true;
     }
@@ -842,7 +842,7 @@ BVHNode *BVHBuild::create_leaf_node(const BVHRange &range, const vector<BVHRefer
   vector<BVHReference, LeafReferenceStackAllocator> object_references;
 
   uint visibility[PRIMITIVE_NUM_TOTAL] = {0};
-  /* NOTE: Keep initializtion in sync with actual number of primitives. */
+  /* NOTE: Keep initialization in sync with actual number of primitives. */
   BoundBox bounds[PRIMITIVE_NUM_TOTAL] = {
       BoundBox::empty, BoundBox::empty, BoundBox::empty, BoundBox::empty};
   int ob_num = 0;
diff --git a/intern/cycles/device/cuda/device_cuda_impl.cpp b/intern/cycles/device/cuda/device_cuda_impl.cpp
index cff30eb9b48..44a51835f4c 100644
--- a/intern/cycles/device/cuda/device_cuda_impl.cpp
+++ b/intern/cycles/device/cuda/device_cuda_impl.cpp
@@ -184,7 +184,7 @@ CUDADevice::CUDADevice(DeviceInfo &info, Stats &stats, Profiler &profiler, bool
 
   functions.loaded = false;
 
-  /* Intialize CUDA. */
+  /* Initialize CUDA. */
   CUresult result = cuInit(0);
   if (result != CUDA_SUCCESS) {
     set_error(string_printf("Failed to initialize CUDA runtime (%s)", cuewErrorString(result)));
diff --git a/intern/cycles/device/device_multi.cpp b/intern/cycles/device/device_multi.cpp
index 44959577fb5..b272e59f99d 100644
--- a/intern/cycles/device/device_multi.cpp
+++ b/intern/cycles/device/device_multi.cpp
@@ -296,7 +296,7 @@ class MultiDevice : public Device {
       i++;
     }
 
-    /* Change geomtry BVH pointers back to the multi BVH */
+    /* Change geometry BVH pointers back to the multi BVH. */
     for (size_t k = 0; k < bvh->geometry.size(); ++k) {
       bvh->geometry[k]->bvh = geom_bvhs[k];
     }
diff --git a/intern/cycles/device/device_network.h b/intern/cycles/device/device_network.h
index e74c4508ab6..b3a0f6daa57 100644
--- a/intern/cycles/device/device_network.h
+++ b/intern/cycles/device/device_network.h
@@ -80,7 +80,7 @@ class network_device_memory : public device_memory {
   vector<char> local_data;
 };
 
-/* Common netowrk error function / object for both DeviceNetwork and DeviceServer*/
+/* Common network error function / object for both DeviceNetwork and DeviceServer. */
 class NetworkError {
  public:
   NetworkError()
diff --git a/intern/cycles/device/opencl/device_opencl.h b/intern/cycles/device/opencl/device_opencl.h
index 4fd3c27f17e..2d6c6d04214 100644
--- a/intern/cycles/device/opencl/device_opencl.h
+++ b/intern/cycles/device/opencl/device_opencl.h
@@ -34,7 +34,7 @@ CCL_NAMESPACE_BEGIN
 /* Disable workarounds, seems to be working fine on latest drivers. */
 #  define CYCLES_DISABLE_DRIVER_WORKAROUNDS
 
-/* Define CYCLES_DISABLE_DRIVER_WORKAROUNDS to disable workaounds for testing */
+/* Define CYCLES_DISABLE_DRIVER_WORKAROUNDS to disable workarounds for testing. */
 #  ifndef CYCLES_DISABLE_DRIVER_WORKAROUNDS
 /* Work around AMD driver hangs by ensuring each command is finished before doing anything else. */
 #    undef clEnqueueNDRangeKernel
@@ -287,7 +287,7 @@ class OpenCLDevice : public Device {
 
     /* Try to load the program from device cache or disk */
     bool load();
-    /* Compile the kernel (first separate, failback to local) */
+    /* Compile the kernel (first separate, fail-back to local). */
     void compile();
     /* Create the OpenCL kernels after loading or compiling */
     void create_kernels();
@@ -628,7 +628,7 @@ class OpenCLDevice : public Device {
   void release_mem_object_safe(cl_mem mem);
   void release_program_safe(cl_program program);
 
-  /* ** Those guys are for workign around some compiler-specific bugs ** */
+  /* ** Those guys are for working around some compiler-specific bugs ** */
 
   cl_program load_cached_kernel(ustring key, thread_scoped_lock &cache_locker);
 
diff --git a/intern/cycles/device/opencl/device_opencl_impl.cpp b/intern/cycles/device/opencl/device_opencl_impl.cpp
index ec699462bfe..aee3b0fb64f 100644
--- a/intern/cycles/device/opencl/device_opencl_impl.cpp
+++ b/intern/cycles/device/opencl/device_opencl_impl.cpp
@@ -2151,7 +2151,7 @@ void OpenCLDevice::release_program_safe(cl_program program)
   }
 }
 
-/* ** Those guys are for workign around some compiler-specific bugs ** */
+/* ** Those guys are for working around some compiler-specific bugs ** */
 
 cl_program OpenCLDevice::load_cached_kernel(ustring key, thread_scoped_lock &cache_locker)
 {
diff --git a/intern/cycles/kernel/bvh/bvh_types.h b/intern/cycles/kernel/bvh/bvh_types.h
index b173568266b..9f0879a2069 100644
--- a/intern/cycles/kernel/bvh/bvh_types.h
+++ b/intern/cycles/kernel/bvh/bvh_types.h
@@ -42,7 +42,7 @@ CCL_NAMESPACE_BEGIN
 
 #define BVH_FEATURE(f) (((BVH_FUNCTION_FEATURES) & (f)) != 0)
 
-/* Debugging heleprs */
+/* Debugging helpers. */
 #ifdef __KERNEL_DEBUG__
 #  define BVH_DEBUG_INIT() \
     do { \
diff --git a/intern/cycles/kernel/closure/bsdf_microfacet.h b/intern/cycles/kernel/closure/bsdf_microfacet.h
index d9e81535b62..32639ba24ec 100644
--- a/intern/cycles/kernel/closure/bsdf_microfacet.h
+++ b/intern/cycles/kernel/closure/bsdf_microfacet.h
@@ -125,7 +125,7 @@ ccl_device_inline void microfacet_beckmann_sample_slopes(KernelGlobals *kg,
   }
   *slope_y = fast_ierff(2.0f * randv - 1.0f);
 #else
-  /* Use precomputed table on CPU, it gives better perfomance. */
+  /* Use precomputed table on CPU, it gives better performance. */
   int beckmann_table_offset = kernel_data.tables.beckmann_offset;
 
   *slope_x = lookup_table_read_2D(
diff --git a/intern/cycles/kernel/filter/filter_transform_gpu.h b/intern/cycles/kernel/filter/filter_transform_gpu.h
index adc85881fe5..ec258a5212a 100644
--- a/intern/cycles/kernel/filter/filter_transform_gpu.h
+++ b/intern/cycles/kernel/filter/filter_transform_gpu.h
@@ -78,7 +78,7 @@ ccl_device void kernel_filter_construct_transform(const ccl_global float *ccl_re
   /* === Generate the feature transformation. ===
    * This transformation maps the num_features-dimensional feature space to a reduced feature
    * (r-feature) space which generally has fewer dimensions.
-   * This mainly helps to prevent overfitting. */
+   * This mainly helps to prevent over-fitting. */
   float feature_matrix[DENOISE_FEATURES * DENOISE_FEATURES];
   math_matrix_zero(feature_matrix, num_features);
   FOR_PIXEL_WINDOW
@@ -91,7 +91,7 @@ ccl_device void kernel_filter_construct_transform(const ccl_global float *ccl_re
 
   math_matrix_jacobi_eigendecomposition(feature_matrix, transform, num_features, transform_stride);
   *rank = 0;
-  /* Prevent overfitting when a small window is used. */
+  /* Prevent over-fitting when a small window is used. */
   int max_rank = min(num_features, num_pixels / 3);
   if (pca_threshold < 0.0f) {
     float threshold_energy = 0.0f;
diff --git a/intern/cycles/kernel/filter/filter_transform_sse.h b/intern/cycles/kernel/filter/filter_transform_sse.h
index 5a124b5d73b..0304d990f9f 100644
--- a/intern/cycles/kernel/filter/filter_transform_sse.h
+++ b/intern/cycles/kernel/filter/filter_transform_sse.h
@@ -93,7 +93,7 @@ ccl_device void kernel_filter_construct_transform(const float *ccl_restrict buff
   math_matrix_jacobi_eigendecomposition(feature_matrix, transform, num_features, 1);
 
   *rank = 0;
-  /* Prevent overfitting when a small window is used. */
+  /* Prevent over-fitting when a small window is used. */
   int max_rank = min(num_features, num_pixels / 3);
   if (pca_threshold < 0.0f) {
     float threshold_energy = 0.0f;
diff --git a/intern/cycles/kernel/geom/geom_object.h b/intern/cycles/kernel/geom/geom_object.h
index 1907f5d3935..fe73335a335 100644
--- a/intern/cycles/kernel/geom/geom_object.h
+++ b/intern/cycles/kernel/geom/geom_object.h
@@ -435,7 +435,7 @@ ccl_device_inline float bvh_instance_push(
   return t;
 }
 
-/* Transorm ray to exit static object in BVH */
+/* Transform ray to exit static object in BVH. */
 
 ccl_device_inline float bvh_instance_pop(
     KernelGlobals *kg, int object, const Ray *ray, float3 *P, float3 *dir, float3 *idir, float t)
@@ -497,7 +497,7 @@ ccl_device_inline float bvh_instance_motion_push(KernelGlobals *kg,
   return t;
 }
 
-/* Transorm ray to exit motion blurred object in BVH */
+/* Transform ray to exit motion blurred object in BVH. */
 
 ccl_device_inline float bvh_instance_motion_pop(KernelGlobals *kg,
                                                 int object,
diff --git a/intern/cycles/kernel/kernel_bake.h b/intern/cycles/kernel/kernel_bake.h
index e876e5d8ca6..ddcf94be1de 100644
--- a/intern/cycles/kernel/kernel_bake.h
+++ b/intern/cycles/kernel/kernel_bake.h
@@ -251,7 +251,7 @@ ccl_device void kernel_bake_evaluate(
     path_rng_2D(kg, rng_hash, sample, num_samples, PRNG_FILTER_U, &filter_x, &filter_y);
   }
 
-  /* Barycentric UV with subpixel offset. */
+  /* Barycentric UV with sub-pixel offset. */
   float u = primitive[2];
   float v = primitive[3];
 
diff --git a/intern/cycles/kernel/kernel_film.h b/intern/cycles/kernel/kernel_film.h
index 17b69b6198b..a6fd4f1dc7e 100644
--- a/intern/cycles/kernel/kernel_film.h
+++ b/intern/cycles/kernel/kernel_film.h
@@ -63,12 +63,12 @@ ccl_device float4 film_map(KernelGlobals *kg, float4 rgba_in, float scale)
 {
   float4 result;
 
-  /* conversion to srgb */
+  /* Conversion to SRGB. */
   result.x = color_linear_to_srgb(rgba_in.x * scale);
   result.y = color_linear_to_srgb(rgba_in.y * scale);
   result.z = color_linear_to_srgb(rgba_in.z * scale);
 
-  /* clamp since alpha might be > 1.0 due to russian roulette */
+  /* Clamp since alpha might be > 1.0 due to Russian roulette. */
   result.w = saturate(rgba_in.w * scale);
 
   return result;
diff --git a/intern/cycles/kernel/kernel_jitter.h b/intern/cycles/kernel/kernel_jitter.h
index b9c48b86a5d..f4e60a807f7 100644
--- a/intern/cycles/kernel/kernel_jitter.h
+++ b/intern/cycles/kernel/kernel_jitter.h
@@ -21,7 +21,7 @@ CCL_NAMESPACE_BEGIN
 /* "Correlated Multi-Jittered Sampling"
  * Andrew Kensler, Pixar Technical Memo 13-01, 2013 */
 
-/* todo: find good value, suggested 64 gives pattern on cornell box ceiling */
+/* TODO: find good value, suggested 64 gives pattern on cornell box ceiling. */
 #define CMJ_RANDOM_OFFSET_LIMIT 4096
 
 ccl_device_inline bool cmj_is_pow2(int i)
@@ -179,7 +179,7 @@ ccl_device void cmj_sample_2D(int s, int N, int p, float *fx, float *fy)
     smodm = cmj_fast_mod_pow2(s, m);
   }
   else {
-    /* Doing s*inmv gives precision issues here. */
+    /* Doing `s * inmv` gives precision issues here. */
     sdivm = s / m;
     smodm = s - sdivm * m;
   }
diff --git a/intern/cycles/kernel/kernel_path_branched.h b/intern/cycles/kernel/kernel_path_branched.h
index b9569f531e6..9ce7a147369 100644
--- a/intern/cycles/kernel/kernel_path_branched.h
+++ b/intern/cycles/kernel/kernel_path_branched.h
@@ -155,7 +155,7 @@ ccl_device_forceinline void kernel_branched_path_volume(KernelGlobals *kg,
   else
 #      endif /* __VOLUME_DECOUPLED__ */
   {
-    /* GPU: no decoupled ray marching, scatter probalistically */
+    /* GPU: no decoupled ray marching, scatter probabilistically. */
     int num_samples = kernel_data.integrator.volume_samples;
     float num_samples_inv = 1.0f / num_samples;
 
diff --git a/intern/cycles/kernel/kernel_random.h b/intern/cycles/kernel/kernel_random.h
index a9b17854f25..49e5e25c2e0 100644
--- a/intern/cycles/kernel/kernel_random.h
+++ b/intern/cycles/kernel/kernel_random.h
@@ -304,7 +304,7 @@ ccl_device_inline bool sample_is_even(int pattern, int sample)
 #elif defined(__KERNEL_OPENCL__)
     return popcount(sample & 0xaaaaaaaa) & 1;
 #else
-    /* TODO(Stefan): popcnt intrinsic for Windows with fallback for older CPUs. */
+    /* TODO(Stefan): pop-count intrinsic for Windows with fallback for older CPUs. */
     int i = sample & 0xaaaaaaaa;
     i = i - ((i >> 1) & 0x55555555);
     i = (i & 0x33333333) + ((i >> 2) & 0x33333333);
diff --git a/intern/cycles/kernel/kernel_types.h b/intern/cycles/kernel/kernel_types.h
index f0e65542693..82cc11922e0 100644
--- a/intern/cycles/kernel/kernel_types.h
+++ b/intern/cycles/kernel/kernel_types.h
@@ -1641,7 +1641,7 @@ enum RayState {
   RAY_UPDATE_BUFFER,
   /* Denotes ray needs to skip most surface shader work. */
   RAY_HAS_ONLY_VOLUME,
-  /* Donotes ray has hit background */
+  /* Denotes ray has hit background */
   RAY_HIT_BACKGROUND,
   /* Denotes ray has to be regenerated */
   RAY_TO_REGENERATE,
@@ -1699,7 +1699,7 @@ typedef struct WorkTile {
   ccl_global float *buffer;
 } WorkTile;
 
-/* Precoumputed sample table sizes for PMJ02 sampler. */
+/* Pre-computed sample table sizes for PMJ02 sampler. */
 #define NUM_PMJ_SAMPLES 64 * 64
 #define NUM_PMJ_PATTERNS 48
 
diff --git a/intern/cycles/kernel/osl/osl_services.cpp b/intern/cycles/kernel/osl/osl_services.cpp
index 2a4a1dfe325..2b7c21d0bc4 100644
--- a/intern/cycles/kernel/osl/osl_services.cpp
+++ b/intern/cycles/kernel/osl/osl_services.cpp
@@ -1033,7 +1033,7 @@ bool OSLRenderServices::get_background_attribute(
     return set_attribute_int(f, type, derivatives, val);
   }
   else if (name == u_ndc) {
-    /* NDC coordinates with special exception for otho */
+    /* NDC coordinates with special exception for orthographic projection. */
     OSLThreadData *tdata = kg->osl_tdata;
     OSL::ShaderGlobals *globals = &tdata->globals;
     float3 ndc[3];
diff --git a/intern/cycles/kernel/osl/osl_shader.cpp b/intern/cycles/kernel/osl/osl_shader.cpp
index 3d0813c15e3..8606c459375 100644
--- a/intern/cycles/kernel/osl/osl_shader.cpp
+++ b/intern/cycles/kernel/osl/osl_shader.cpp
@@ -129,7 +129,7 @@ static void shaderdata_to_shaderglobals(
   /* clear trace data */
   tdata->tracedata.init = false;
 
-  /* used by renderservices */
+  /* Used by render-services. */
   sd->osl_globals = kg;
   sd->osl_path_state = state;
 }
diff --git a/intern/cycles/kernel/shaders/node_image_texture.osl b/intern/cycles/kernel/shaders/node_image_texture.osl
index 22d34a1082c..9e2ef84c872 100644
--- a/intern/cycles/kernel/shaders/node_image_texture.osl
+++ b/intern/cycles/kernel/shaders/node_image_texture.osl
@@ -42,7 +42,7 @@ point map_to_sphere(vector dir)
   float v, u;
   if (len > 0.0) {
     if (dir[0] == 0.0 && dir[1] == 0.0) {
-      u = 0.0; /* Othwise domain error. */
+      u = 0.0; /* Otherwise domain error. */
     }
     else {
       u = (1.0 - atan2(dir[0], dir[1]) / M_PI) / 2.0;
diff --git a/intern/cycles/kernel/split/kernel_branched.h b/intern/cycles/kernel/split/kernel_branched.h
index bfcd21baac4..45f5037d321 100644
--- a/intern/cycles/kernel/split/kernel_branched.h
+++ b/intern/cycles/kernel/split/kernel_branched.h
@@ -41,7 +41,7 @@ ccl_device_inline void kernel_split_branched_path_indirect_loop_init(KernelGloba
 
 #  undef BRANCHED_STORE
 
-  /* set loop counters to intial position */
+  /* Set loop counters to initial position. */
   branched_state->next_closure = 0;
   branched_state->next_sample = 0;
 }
diff --git a/intern/cycles/kernel/split/kernel_do_volume.h b/intern/cycles/kernel/split/kernel_do_volume.h
index b24699ec39c..1775e870f07 100644
--- a/intern/cycles/kernel/split/kernel_do_volume.h
+++ b/intern/cycles/kernel/split/kernel_do_volume.h
@@ -35,7 +35,7 @@ ccl_device_noinline bool kernel_split_branched_path_volume_indirect_light_iter(K
   PathRadiance *L = &kernel_split_state.path_radiance[ray_index];
   ShaderData *emission_sd = AS_SHADER_DATA(&kernel_split_state.sd_DL_shadow[ray_index]);
 
-  /* GPU: no decoupled ray marching, scatter probalistically */
+  /* GPU: no decoupled ray marching, scatter probabilistically. */
   int num_samples = kernel_data.integrator.volume_samples;
   float num_samples_inv = 1.0f / num_samples;
 
diff --git a/intern/cycles/kernel/split/kernel_enqueue_inactive.h b/intern/cycles/kernel/split/kernel_enqueue_inactive.h
index 31d2daef616..745313f89f1 100644
--- a/intern/cycles/kernel/split/kernel_enqueue_inactive.h
+++ b/intern/cycles/kernel/split/kernel_enqueue_inactive.h
@@ -20,7 +20,7 @@ ccl_device void kernel_enqueue_inactive(KernelGlobals *kg,
                                         ccl_local_param unsigned int *local_queue_atomics)
 {
 #ifdef __BRANCHED_PATH__
-  /* Enqeueue RAY_INACTIVE rays into QUEUE_INACTIVE_RAYS queue. */
+  /* Enqueue RAY_INACTIVE rays into QUEUE_INACTIVE_RAYS queue. */
   if (ccl_local_id(0) == 0 && ccl_local_id(1) == 0) {
     *local_queue_atomics = 0;
   }
diff --git a/intern/cycles/kernel/split/kernel_shader_setup.h b/intern/cycles/kernel/split/kernel_shader_setup.h
index 900cbcb869c..551836d1653 100644
--- a/intern/cycles/kernel/split/kernel_shader_setup.h
+++ b/intern/cycles/kernel/split/kernel_shader_setup.h
@@ -25,7 +25,7 @@ CCL_NAMESPACE_BEGIN
 ccl_device void kernel_shader_setup(KernelGlobals *kg,
                                     ccl_local_param unsigned int *local_queue_atomics)
 {
-  /* Enqeueue RAY_TO_REGENERATE rays into QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS queue. */
+  /* Enqueue RAY_TO_REGENERATE rays into QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS queue. */
   if (ccl_local_id(0) == 0 && ccl_local_id(1) == 0) {
     *local_queue_atomics = 0;
   }
diff --git a/intern/cycles/kernel/svm/svm_hsv.h b/intern/cycles/kernel/svm/svm_hsv.h
index 1f7bd421869..c299cf58c7f 100644
--- a/intern/cycles/kernel/svm/svm_hsv.h
+++ b/intern/cycles/kernel/svm/svm_hsv.h
@@ -37,7 +37,7 @@ ccl_device void svm_node_hsv(
 
   color = rgb_to_hsv(color);
 
-  /* remember: fmod doesn't work for negative numbers here */
+  /* Remember: `fmodf` doesn't work for negative numbers here. */
   color.x = fmodf(color.x + hue + 0.5f, 1.0f);
   color.y = saturate(color.y * sat);
   color.z *= val;
@@ -48,7 +48,7 @@ ccl_device void svm_node_hsv(
   color.y = fac * color.y + (1.0f - fac) * in_color.y;
   color.z = fac * color.z + (1.0f - fac) * in_color.z;
 
-  /* Clamp color to prevent negative values caused by oversaturation. */
+  /* Clamp color to prevent negative values caused by over saturation. */
   color.x = max(color.x, 0.0f);
   color.y = max(color.y, 0.0f);
   color.z = max(color.z, 0.0f);
diff --git a/intern/cycles/kernel/svm/svm_image.h b/intern/cycles/kernel/svm/svm_image.h
index f57c85fc23e..742addab611 100644
--- a/intern/cycles/kernel/svm/svm_image.h
+++ b/intern/cycles/kernel/svm/svm_image.h
@@ -38,7 +38,7 @@ ccl_device float4 svm_image_texture(KernelGlobals *kg, int id, float x, float y,
   return r;
 }
 
-/* Remap coordnate from 0..1 box to -1..-1 */
+/* Remap coordinate from 0..1 box to -1..-1 */
 ccl_device_inline float3 texco_remap_square(float3 co)
 {
   return (co - make_float3(0.5f, 0.5f, 0.5f)) * 2.0f;
diff --git a/intern/cycles/kernel/svm/svm_noise.h b/intern/cycles/kernel/svm/svm_noise.h
index 7db8ffcc6e1..7ad61f23cc1 100644
--- a/intern/cycles/kernel/svm/svm_noise.h
+++ b/intern/cycles/kernel/svm/svm_noise.h
@@ -615,8 +615,8 @@ ccl_device_noinline float perlin_3d(float x, float y, float z)
  *
  *    Point  Offset from v0
  *     v0     (0, 0, 0, 0)
- *     v1     (0, 0, 1, 0)  The full avx type is computed by inserting the following
- *     v2     (0, 1, 0, 0)  sse types into both the low and high parts of the avx.
+ *     v1     (0, 0, 1, 0)  The full AVX type is computed by inserting the following
+ *     v2     (0, 1, 0, 0)  sse types into both the low and high parts of the AVX.
  *     v3     (0, 1, 1, 0)
  *     v4     (1, 0, 0, 0)
  *     v5     (1, 0, 1, 0)  (0, 1, 0, 1) = shuffle<0, 2, 0, 2>(shuffle<2, 2, 2, 2>(V, V + 1))
diff --git a/intern/cycles/kernel/svm/svm_types.h b/intern/cycles/kernel/svm/svm_types.h
index c228df14985..4a00afc1d7f 100644
--- a/intern/cycles/kernel/svm/svm_types.h
+++ b/intern/cycles/kernel/svm/svm_types.h
@@ -205,8 +205,8 @@ typedef enum NodeHairInfo {
   NODE_INFO_CURVE_IS_STRAND,
   NODE_INFO_CURVE_INTERCEPT,
   NODE_INFO_CURVE_THICKNESS,
-  /*fade for minimum hair width transpency*/
-  /*NODE_INFO_CURVE_FADE,*/
+  /* Fade for minimum hair width transiency. */
+  // NODE_INFO_CURVE_FADE,
   NODE_INFO_CURVE_TANGENT_NORMAL,
   NODE_INFO_CURVE_RANDOM,
 } NodeHairInfo;
diff --git a/intern/cycles/render/alembic.cpp b/intern/cycles/render/alembic.cpp
index a9d43415865..5942e512e60 100644
--- a/intern/cycles/render/alembic.cpp
+++ b/intern/cycles/render/alembic.cpp
@@ -1346,7 +1346,7 @@ void AlembicProcedural::generate(Scene *scene, Progress &progress)
 
   bool need_shader_updates = false;
 
-  /* check for changes in shaders (newly requested atttributes) */
+  /* Check for changes in shaders (newly requested attributes). */
   foreach (Node *object_node, objects) {
     AlembicObject *object = static_cast<AlembicObject *>(object_node);
 
@@ -1626,7 +1626,7 @@ void AlembicProcedural::read_subd(Scene *scene,
 
   mesh->clear_non_sockets();
 
-  /* udpate sockets */
+  /* Update sockets. */
 
   Object *object = abc_object->get_object();
   cached_data.transforms.copy_to_socket(frame_time, object, object->get_tfm_socket());
@@ -1660,7 +1660,7 @@ void AlembicProcedural::read_subd(Scene *scene,
 
   mesh->set_num_subd_faces(mesh->get_subd_shader().size());
 
-  /* udpate attributes */
+  /* Update attributes. */
 
   update_attributes(mesh->subd_attributes, cached_data, frame_time);
 
diff --git a/intern/cycles/render/alembic.h b/intern/cycles/render/alembic.h
index 77bdac09ba2..6b0d32fb3ab 100644
--- a/intern/cycles/render/alembic.h
+++ b/intern/cycles/render/alembic.h
@@ -361,7 +361,7 @@ class AlembicProcedural : public Procedural {
   /* Tag for an update only if something was modified. */
   void tag_update(Scene *scene);
 
-  /* Returns a pointer to an exisiting or a newly created AlembicObject for the given path. */
+  /* Returns a pointer to an existing or a newly created AlembicObject for the given path. */
   AlembicObject *get_or_create_object(const ustring &path);
 
  private:
diff --git a/intern/cycles/render/buffers.cpp b/intern/cycles/render/buffers.cpp
index 045931ffdac..0948b20628f 100644
--- a/intern/cycles/render/buffers.cpp
+++ b/intern/cycles/render/buffers.cpp
@@ -448,7 +448,7 @@ bool RenderBuffers::get_pass_rect(
           pixels[1] = f.y * scale_exposure;
           pixels[2] = f.z * scale_exposure;
 
-          /* clamp since alpha might be > 1.0 due to russian roulette */
+          /* Clamp since alpha might be > 1.0 due to Russian roulette. */
           pixels[3] = saturate(f.w * scale);
         }
       }
diff --git a/intern/cycles/render/camera.cpp b/intern/cycles/render/camera.cpp
index 3beb3d1d4d3..30bf6c4241a 100644
--- a/intern/cycles/render/camera.cpp
+++ b/intern/cycles/render/camera.cpp
@@ -252,11 +252,11 @@ void Camera::update(Scene *scene)
   Transform fulltoborder = transform_from_viewplane(viewport_camera_border);
   Transform bordertofull = transform_inverse(fulltoborder);
 
-  /* ndc to raster */
+  /* NDC to raster. */
   Transform ndctoraster = transform_scale(width, height, 1.0f) * bordertofull;
   Transform full_ndctoraster = transform_scale(full_width, full_height, 1.0f) * bordertofull;
 
-  /* raster to screen */
+  /* Raster to screen. */
   Transform screentondc = fulltoborder * transform_from_viewplane(viewplane);
 
   Transform screentoraster = ndctoraster * screentondc;
@@ -264,7 +264,7 @@ void Camera::update(Scene *scene)
   Transform full_screentoraster = full_ndctoraster * screentondc;
   Transform full_rastertoscreen = transform_inverse(full_screentoraster);
 
-  /* screen to camera */
+  /* Screen to camera. */
   ProjectionTransform cameratoscreen;
   if (camera_type == CAMERA_PERSPECTIVE)
     cameratoscreen = projection_perspective(fov, nearclip, farclip);
diff --git a/intern/cycles/render/colorspace.cpp b/intern/cycles/render/colorspace.cpp
index 57979d5f225..4c9e86ea278 100644
--- a/intern/cycles/render/colorspace.cpp
+++ b/intern/cycles/render/colorspace.cpp
@@ -386,7 +386,7 @@ void ColorSpaceManager::free_memory()
 #endif
 }
 
-/* Template instanstations so we don't have to inline functions. */
+/* Template instantiations so we don't have to inline functions. */
 template void ColorSpaceManager::to_scene_linear(ustring, uchar *, size_t, bool);
 template void ColorSpaceManager::to_scene_linear(ustring, ushort *, size_t, bool);
 template void ColorSpaceManager::to_scene_linear(ustring, half *, size_t, bool);
diff --git a/intern/cycles/render/denoising.cpp b/intern/cycles/render/denoising.cpp
index 76408ca4849..ddbe7484800 100644
--- a/intern/cycles/render/denoising.cpp
+++ b/intern/cycles/render/denoising.cpp
@@ -847,7 +847,7 @@ bool DenoiseImage::save_output(const string &out_filepath, string &error)
 
   out.reset();
 
-  /* Copy temporary file to outputput filepath. */
+  /* Copy temporary file to output filepath. */
   string rename_error;
   if (ok && !OIIO::Filesystem::rename(tmp_filepath, out_filepath, rename_error)) {
     error = "Failed to move denoised image to " + out_filepath + ": " + rename_error;
diff --git a/intern/cycles/render/geometry.cpp b/intern/cycles/render/geometry.cpp
index b6fe8a66b87..9ea56b30ffa 100644
--- a/intern/cycles/render/geometry.cpp
+++ b/intern/cycles/render/geometry.cpp
@@ -1453,7 +1453,7 @@ void GeometryManager::device_update_preprocess(Device *device, Scene *scene, Pro
       if (shader->need_update_uvs) {
         device_update_flags |= ATTR_FLOAT2_NEEDS_REALLOC;
 
-        /* Attributes might need to be tesselated if added. */
+        /* Attributes might need to be tessellated if added. */
         if (geom->is_mesh()) {
           Mesh *mesh = static_cast<Mesh *>(geom);
           if (mesh->need_tesselation()) {
@@ -1465,7 +1465,7 @@ void GeometryManager::device_update_preprocess(Device *device, Scene *scene, Pro
       if (shader->need_update_attribute) {
         device_update_flags |= ATTRS_NEED_REALLOC;
 
-        /* Attributes might need to be tesselated if added. */
+        /* Attributes might need to be tessellated if added. */
         if (geom->is_mesh()) {
           Mesh *mesh = static_cast<Mesh *>(geom);
           if (mesh->need_tesselation()) {
diff --git a/intern/cycles/render/graph.cpp b/intern/cycles/render/graph.cpp
index 4adfebf80ae..5e068e74ce0 100644
--- a/intern/cycles/render/graph.cpp
+++ b/intern/cycles/render/graph.cpp
@@ -276,7 +276,7 @@ void ShaderGraph::connect(ShaderOutput *from, ShaderInput *to)
       emission->set_color(make_float3(1.0f, 1.0f, 1.0f));
       emission->set_strength(1.0f);
       convert = add(emission);
-      /* Connect float inputs to Strength to save an additional Falue->Color conversion. */
+      /* Connect float inputs to Strength to save an additional Value->Color conversion. */
       if (from->type() == SocketType::FLOAT) {
         convert_in = convert->input("Strength");
       }
diff --git a/intern/cycles/render/image.cpp b/intern/cycles/render/image.cpp
index a09a680f93f..29a95beaf7e 100644
--- a/intern/cycles/render/image.cpp
+++ b/intern/cycles/render/image.cpp
@@ -419,7 +419,7 @@ int ImageManager::add_image_slot(ImageLoader *loader,
 
   thread_scoped_lock device_lock(images_mutex);
 
-  /* Fnd existing image. */
+  /* Find existing image. */
   for (slot = 0; slot < images.size(); slot++) {
     img = images[slot];
     if (img && ImageLoader::equals(img->loader, loader) && img->params == params) {
diff --git a/intern/cycles/render/light.cpp b/intern/cycles/render/light.cpp
index 638ac376157..1e54a237816 100644
--- a/intern/cycles/render/light.cpp
+++ b/intern/cycles/render/light.cpp
@@ -979,7 +979,7 @@ void LightManager::device_update(Device *device,
 
   VLOG(1) << "Total " << scene->lights.size() << " lights.";
 
-  /* Detect which lights are enabled, also determins if we need to update the background. */
+  /* Detect which lights are enabled, also determines if we need to update the background. */
   test_enabled_lights(scene);
 
   device_free(device, dscene, need_update_background);
diff --git a/intern/cycles/render/merge.cpp b/intern/cycles/render/merge.cpp
index 3ea3952b96c..8a58c827e82 100644
--- a/intern/cycles/render/merge.cpp
+++ b/intern/cycles/render/merge.cpp
@@ -151,7 +151,7 @@ static bool parse_channels(const ImageSpec &in_spec,
     string layername, passname, channelname;
     if (parse_channel_name(
             pass.channel_name, layername, passname, channelname, multiview_channels)) {
-      /* Channer part of a render layer. */
+      /* Channel part of a render layer. */
       pass.op = parse_channel_operation(passname);
     }
     else {
@@ -163,7 +163,7 @@ static bool parse_channels(const ImageSpec &in_spec,
     file_layers[layername].passes.push_back(pass);
   }
 
-  /* Loop over all detected RenderLayers, check whether they contain a full set of input channels.
+  /* Loop over all detected render-layers, check whether they contain a full set of input channels.
    * Any channels that won't be processed internally are also passed through. */
   for (auto &i : file_layers) {
     const string &name = i.first;
@@ -457,7 +457,7 @@ static bool save_output(const string &filepath,
 
   out.reset();
 
-  /* Copy temporary file to outputput filepath. */
+  /* Copy temporary file to output filepath. */
   string rename_error;
   if (ok && !OIIO::Filesystem::rename(tmp_filepath, filepath, rename_error)) {
     error = "Failed to move merged image to " + filepath + ": " + rename_error;
diff --git a/intern/cycles/render/nodes.h b/intern/cycles/render/nodes.h
index 4d51b4fccaf..d4603143ef4 100644
--- a/intern/cycles/render/nodes.h
+++ b/intern/cycles/render/nodes.h
@@ -1612,7 +1612,7 @@ class OSLNode : public ShaderNode {
 
   SHADER_NODE_NO_CLONE_CLASS(OSLNode)
 
-  /* ideally we could beter detect this, but we can't query this now */
+  /* Ideally we could better detect this, but we can't query this now. */
   bool has_spatial_varying()
   {
     return true;
diff --git a/intern/cycles/render/osl.cpp b/intern/cycles/render/osl.cpp
index 889636fe0f3..53c67049571 100644
--- a/intern/cycles/render/osl.cpp
+++ b/intern/cycles/render/osl.cpp
@@ -380,7 +380,7 @@ const char *OSLShaderManager::shader_load_filepath(string filepath)
         return hash;
     }
 
-    /* autocompile .OSL to .OSO if needed */
+    /* Auto-compile .OSL to .OSO if needed. */
     if (oso_modified_time == 0 || (oso_modified_time < modified_time)) {
       OSLShaderManager::osl_compile(filepath, osopath);
       modified_time = path_modified_time(osopath);
@@ -562,7 +562,7 @@ OSLNode *OSLShaderManager::osl_node(ShaderGraph *graph,
     }
   }
 
-  /* set bytcode hash or filepath */
+  /* Set byte-code hash or file-path. */
   if (!bytecode_hash.empty()) {
     node->bytecode_hash = bytecode_hash;
   }
diff --git a/intern/cycles/render/scene.h b/intern/cycles/render/scene.h
index 7595817226c..61c753e411c 100644
--- a/intern/cycles/render/scene.h
+++ b/intern/cycles/render/scene.h
@@ -358,7 +358,7 @@ class Scene : public NodeOwner {
 
   DeviceRequestedFeatures get_requested_device_features();
 
-  /* Maximumnumber of closure during session lifetime. */
+  /* Maximum number of closure during session lifetime. */
   int max_closure_global;
 
   /* Get maximum number of closures to be used in kernel. */
diff --git a/intern/cycles/subd/subd_split.cpp b/intern/cycles/subd/subd_split.cpp
index 928f5bf2ed7..4d648eb1f77 100644
--- a/intern/cycles/subd/subd_split.cpp
+++ b/intern/cycles/subd/subd_split.cpp
@@ -549,7 +549,7 @@ void DiagSplit::split_ngon(const Mesh::SubdFace &face, Patch *patches, size_t pa
     subpatch.edge_v1.indices_decrease_along_edge = true;
     subpatch.edge_u0.indices_decrease_along_edge = u0_reversed;
 
-    /* Perfrom split. */
+    /* Perform split. */
     {
       subpatch.edge_u0.T = T(subpatch.patch, subpatch.c00, subpatch.c10);
       subpatch.edge_u1.T = T(subpatch.patch, subpatch.c01, subpatch.c11);
@@ -646,7 +646,7 @@ void DiagSplit::post_split()
   /* Set start and end indices for edges generated from a split. */
   foreach (Edge &edge, edges) {
     if (edge.start_vert_index < 0) {
-      /* Fixup offsets. */
+      /* Fix up offsets. */
       if (edge.top_indices_decrease) {
         edge.top_offset = edge.top->T - edge.top_offset;
       }
diff --git a/intern/cycles/subd/subd_split.h b/intern/cycles/subd/subd_split.h
index 773f4ddf120..7416b2fbbf8 100644
--- a/intern/cycles/subd/subd_split.h
+++ b/intern/cycles/subd/subd_split.h
@@ -40,7 +40,7 @@ class DiagSplit {
   SubdParams params;
 
   vector<Subpatch> subpatches;
-  /* deque is used so that element pointers remain vaild when size is changed. */
+  /* `deque` is used so that element pointers remain valid when size is changed. */
   deque<Edge> edges;
 
   float3 to_world(Patch *patch, float2 uv);
diff --git a/intern/cycles/util/util_math.h b/intern/cycles/util/util_math.h
index 8caabf6eac3..ad04340231e 100644
--- a/intern/cycles/util/util_math.h
+++ b/intern/cycles/util/util_math.h
@@ -349,7 +349,7 @@ ccl_device_inline float fractf(float x)
   return x - floorf(x);
 }
 
-/* Adapted from godotengine math_funcs.h. */
+/* Adapted from godot-engine math_funcs.h. */
 ccl_device_inline float wrapf(float value, float max, float min)
 {
   float range = max - min;
@@ -385,7 +385,7 @@ ccl_device_inline float nonzerof(float f, float eps)
     return f;
 }
 
-/* Signum function testing for zero. Matches GLSL and OSL functions. */
+/* `signum` function testing for zero. Matches GLSL and OSL functions. */
 ccl_device_inline float compatible_signf(float f)
 {
   if (f == 0.0f) {
@@ -754,7 +754,7 @@ ccl_device_inline float2 map_to_sphere(const float3 co)
   float u, v;
   if (l > 0.0f) {
     if (UNLIKELY(co.x == 0.0f && co.y == 0.0f)) {
-      u = 0.0f; /* othwise domain error */
+      u = 0.0f; /* Otherwise domain error. */
     }
     else {
       u = (1.0f - atan2f(co.x, co.y) / M_PI_F) / 2.0f;
diff --git a/intern/cycles/util/util_math_fast.h b/intern/cycles/util/util_math_fast.h
index 07b0878e3d5..107b36ce6cd 100644
--- a/intern/cycles/util/util_math_fast.h
+++ b/intern/cycles/util/util_math_fast.h
@@ -84,7 +84,7 @@ ccl_device_inline int fast_rint(float x)
 {
   /* used by sin/cos/tan range reduction. */
 #ifdef __KERNEL_SSE4__
-  /* Single roundps instruction on SSE4.1+ (for gcc/clang at least). */
+  /* Single `roundps` instruction on SSE4.1+ (for gcc/clang at least). */
   return float_to_int(rintf(x));
 #else
   /* emulate rounding by adding/subtracting 0.5. */
@@ -613,7 +613,7 @@ ccl_device_inline float fast_erfcf(float x)
 
 ccl_device_inline float fast_ierff(float x)
 {
-  /* From: Approximating the erfinv function by Mike Giles. */
+  /* From: Approximating the `erfinv` function by Mike Giles. */
   /* To avoid trouble at the limit, clamp input to 1-eps. */
   float a = fabsf(x);
   if (a > 0.99999994f) {
diff --git a/intern/cycles/util/util_math_matrix.h b/intern/cycles/util/util_math_matrix.h
index 1dc661a7aa7..123736f75a6 100644
--- a/intern/cycles/util/util_math_matrix.h
+++ b/intern/cycles/util/util_math_matrix.h
@@ -161,7 +161,7 @@ ccl_device_inline void math_trimatrix_add_gramian(ccl_global float *A,
   }
 }
 
-/* Transpose matrix A inplace. */
+/* Transpose matrix A in place. */
 ccl_device_inline void math_matrix_transpose(ccl_global float *A, int n, int stride)
 {
   for (int i = 0; i < n; i++) {
diff --git a/intern/cycles/util/util_md5.h b/intern/cycles/util/util_md5.h
index 4622945f9d2..3102a0f4bad 100644
--- a/intern/cycles/util/util_md5.h
+++ b/intern/cycles/util/util_md5.h
@@ -49,7 +49,7 @@ class MD5Hash {
   void process(const uint8_t *data);
   void finish(uint8_t digest[16]);
 
-  uint32_t count[2]; /* message length in bits, lsw first */
+  uint32_t count[2]; /* message length in bits, LSW first. */
   uint32_t abcd[4];  /* digest buffer */
   uint8_t buf[64];   /* accumulate block */
 };
diff --git a/intern/cycles/util/util_stack_allocator.h b/intern/cycles/util/util_stack_allocator.h
index 36db655e5eb..ef31c0fe5e2 100644
--- a/intern/cycles/util/util_stack_allocator.h
+++ b/intern/cycles/util/util_stack_allocator.h
@@ -126,7 +126,7 @@ template<int SIZE, typename T> class ccl_try_align(16) StackAllocator
     return size_t(-1);
   }
 
-  /* Rebind to other ype of allocator. */
+  /* Rebind to other type of allocator. */
 
   template<class U> struct rebind {
     typedef StackAllocator<SIZE, U> other;
diff --git a/intern/cycles/util/util_string.h b/intern/cycles/util/util_string.h
index f51aa7111e8..6b6f493bd94 100644
--- a/intern/cycles/util/util_string.h
+++ b/intern/cycles/util/util_string.h
@@ -66,9 +66,9 @@ string string_from_wstring(const wstring &path);
 string string_to_ansi(const string &str);
 #endif
 
-/* Make a string from a size in bytes in human readable form */
+/* Make a string from a size in bytes in human readable form. */
 string string_human_readable_size(size_t size);
-/* Make a string from a unitless quantity in human readable form */
+/* Make a string from a unit-less quantity in human readable form. */
 string string_human_readable_number(size_t num);
 
 CCL_NAMESPACE_END