Merge branch 'master' into blender2.8

27 files changed, 484 insertions, 471 deletions

diff --git a/intern/cycles/blender/blender_session.cpp b/intern/cycles/blender/blender_session.cpp
index f4e9da43454..75cc06ecd82 100644
--- a/intern/cycles/blender/blender_session.cpp
+++ b/intern/cycles/blender/blender_session.cpp
@@ -121,8 +121,7 @@ void BlenderSession::create()
 void BlenderSession::create_session()
 {
 	SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
-	bool is_cpu = session_params.device.type == DEVICE_CPU;
-	SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background, is_cpu);
+	SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background);
 	bool session_pause = BlenderSync::get_session_pause(b_scene, background);
 
 	/* reset status/progress */
@@ -147,7 +146,7 @@ void BlenderSession::create_session()
 	session->set_pause(session_pause);
 
 	/* create sync */
-	sync = new BlenderSync(b_engine, b_data, b_depsgraph, b_scene, scene, !background, session->progress, is_cpu);
+	sync = new BlenderSync(b_engine, b_data, b_depsgraph, b_scene, scene, !background, session->progress);
 	BL::Object b_camera_override(b_engine.camera_override());
 	if(b_v3d) {
 		if(session_pause == false) {
@@ -185,8 +184,7 @@ void BlenderSession::reset_session(BL::BlendData& b_data_, BL::Scene& b_scene_)
 	b_scene = b_scene_;
 
 	SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
-	const bool is_cpu = session_params.device.type == DEVICE_CPU;
-	SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background, is_cpu);
+	SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background);
 
 	width = render_resolution_x(b_render);
 	height = render_resolution_y(b_render);
@@ -217,7 +215,7 @@ void BlenderSession::reset_session(BL::BlendData& b_data_, BL::Scene& b_scene_)
 	session->stats.mem_peak = session->stats.mem_used;
 
 	/* sync object should be re-created */
-	sync = new BlenderSync(b_engine, b_data, b_depsgraph, b_scene, scene, !background, session->progress, is_cpu);
+	sync = new BlenderSync(b_engine, b_data, b_depsgraph, b_scene, scene, !background, session->progress);
 
 	/* for final render we will do full data sync per render layer, only
 	 * do some basic syncing here, no objects or materials for speed */
@@ -742,8 +740,7 @@ void BlenderSession::synchronize()
 
 	/* on session/scene parameter changes, we recreate session entirely */
 	SessionParams session_params = BlenderSync::get_session_params(b_engine, b_userpref, b_scene, background);
-	const bool is_cpu = session_params.device.type == DEVICE_CPU;
-	SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background, is_cpu);
+	SceneParams scene_params = BlenderSync::get_scene_params(b_scene, background);
 	bool session_pause = BlenderSync::get_session_pause(b_scene, background);
 
 	if(session->params.modified(session_params) ||
diff --git a/intern/cycles/blender/blender_sync.cpp b/intern/cycles/blender/blender_sync.cpp
index 432f67f3b5e..c1783045f66 100644
--- a/intern/cycles/blender/blender_sync.cpp
+++ b/intern/cycles/blender/blender_sync.cpp
@@ -48,8 +48,7 @@ BlenderSync::BlenderSync(BL::RenderEngine& b_engine,
                          BL::Scene& b_scene,
                          Scene *scene,
                          bool preview,
-                         Progress &progress,
-                         bool is_cpu)
+                         Progress &progress)
 : b_engine(b_engine),
   b_data(b_data),
   b_depsgraph(b_depsgraph),
@@ -65,7 +64,6 @@ BlenderSync::BlenderSync(BL::RenderEngine& b_engine,
   scene(scene),
   preview(preview),
   experimental(false),
-  is_cpu(is_cpu),
   dicing_rate(1.0f),
   max_subdivisions(12),
   progress(progress)
@@ -598,8 +596,7 @@ array<Pass> BlenderSync::sync_render_passes(BL::RenderLayer& b_rlay,
 /* Scene Parameters */
 
 SceneParams BlenderSync::get_scene_params(BL::Scene& b_scene,
-                                          bool background,
-                                          bool is_cpu)
+                                          bool background)
 {
 	BL::RenderSettings r = b_scene.render();
 	SceneParams params;
@@ -639,15 +636,7 @@ SceneParams BlenderSync::get_scene_params(BL::Scene& b_scene,
 		params.texture_limit = 0;
 	}
 
-#if !(defined(__GNUC__) && (defined(i386) || defined(_M_IX86)))
-	if(is_cpu) {
-		params.use_qbvh = DebugFlags().cpu.qbvh && system_cpu_support_sse2();
-	}
-	else
-#endif
-	{
-		params.use_qbvh = false;
-	}
+	params.use_qbvh = DebugFlags().cpu.qbvh;
 
 	return params;
 }
diff --git a/intern/cycles/blender/blender_sync.h b/intern/cycles/blender/blender_sync.h
index 69fee9551dd..544836f0979 100644
--- a/intern/cycles/blender/blender_sync.h
+++ b/intern/cycles/blender/blender_sync.h
@@ -56,8 +56,7 @@ public:
 	            BL::Scene& b_scene,
 	            Scene *scene,
 	            bool preview,
-	            Progress &progress,
-	            bool is_cpu);
+	            Progress &progress);
 	~BlenderSync();
 
 	/* sync */
@@ -85,8 +84,7 @@ public:
 
 	/* get parameters */
 	static SceneParams get_scene_params(BL::Scene& b_scene,
-	                                    bool background,
-	                                    bool is_cpu);
+	                                    bool background);
 	static SessionParams get_session_params(BL::RenderEngine& b_engine,
 	                                        BL::UserPreferences& b_userpref,
 	                                        BL::Scene& b_scene,
@@ -182,7 +180,6 @@ private:
 	Scene *scene;
 	bool preview;
 	bool experimental;
-	bool is_cpu;
 
 	float dicing_rate;
 	int max_subdivisions;
diff --git a/intern/cycles/device/device.cpp b/intern/cycles/device/device.cpp
index 5ae83b56fcd..19c4bec55a8 100644
--- a/intern/cycles/device/device.cpp
+++ b/intern/cycles/device/device.cpp
@@ -35,6 +35,7 @@ CCL_NAMESPACE_BEGIN
 
 bool Device::need_types_update = true;
 bool Device::need_devices_update = true;
+thread_mutex Device::device_mutex;
 vector<DeviceType> Device::types;
 vector<DeviceInfo> Device::devices;
 
@@ -443,53 +444,49 @@ string Device::string_from_type(DeviceType type)
 
 vector<DeviceType>& Device::available_types()
 {
+	thread_scoped_lock lock(device_mutex);
 	if(need_types_update) {
 		types.clear();
 		types.push_back(DEVICE_CPU);
-
 #ifdef WITH_CUDA
-		if(device_cuda_init())
+		if(device_cuda_init()) {
 			types.push_back(DEVICE_CUDA);
+		}
 #endif
-
 #ifdef WITH_OPENCL
-		if(device_opencl_init())
+		if(device_opencl_init()) {
 			types.push_back(DEVICE_OPENCL);
+		}
 #endif
-
 #ifdef WITH_NETWORK
 		types.push_back(DEVICE_NETWORK);
 #endif
-
 		need_types_update = false;
 	}
-
 	return types;
 }
 
 vector<DeviceInfo>& Device::available_devices()
 {
+	thread_scoped_lock lock(device_mutex);
 	if(need_devices_update) {
 		devices.clear();
-#ifdef WITH_CUDA
-		if(device_cuda_init())
-			device_cuda_info(devices);
-#endif
-
 #ifdef WITH_OPENCL
-		if(device_opencl_init())
+		if(device_opencl_init()) {
 			device_opencl_info(devices);
+		}
+#endif
+#ifdef WITH_CUDA
+		if(device_cuda_init()) {
+			device_cuda_info(devices);
+		}
 #endif
-
 		device_cpu_info(devices);
-
 #ifdef WITH_NETWORK
 		device_network_info(devices);
 #endif
-
 		need_devices_update = false;
 	}
-
 	return devices;
 }
 
@@ -497,12 +494,6 @@ string Device::device_capabilities()
 {
 	string capabilities = "CPU device capabilities: ";
 	capabilities += device_cpu_capabilities() + "\n";
-#ifdef WITH_CUDA
-	if(device_cuda_init()) {
-		capabilities += "\nCUDA device capabilities:\n";
-		capabilities += device_cuda_capabilities();
-	}
-#endif
 
 #ifdef WITH_OPENCL
 	if(device_opencl_init()) {
@@ -511,6 +502,13 @@ string Device::device_capabilities()
 	}
 #endif
 
+#ifdef WITH_CUDA
+	if(device_cuda_init()) {
+		capabilities += "\nCUDA device capabilities:\n";
+		capabilities += device_cuda_capabilities();
+	}
+#endif
+
 	return capabilities;
 }
 
@@ -526,10 +524,14 @@ DeviceInfo Device::get_multi_device(vector<DeviceInfo> subdevices)
 	info.num = 0;
 
 	info.has_bindless_textures = true;
+	info.has_volume_decoupled = true;
+	info.has_qbvh = true;
 	foreach(DeviceInfo &device, subdevices) {
 		assert(device.type == info.multi_devices[0].type);
 
 		info.has_bindless_textures &= device.has_bindless_textures;
+		info.has_volume_decoupled &= device.has_volume_decoupled;
+		info.has_qbvh &= device.has_qbvh;
 	}
 
 	return info;
diff --git a/intern/cycles/device/device.h b/intern/cycles/device/device.h
index fe0bcc5b91f..29803abd153 100644
--- a/intern/cycles/device/device.h
+++ b/intern/cycles/device/device.h
@@ -55,6 +55,8 @@ public:
 	bool display_device;
 	bool advanced_shading;
 	bool has_bindless_textures; /* flag for GPU and Multi device */
+	bool has_volume_decoupled;
+	bool has_qbvh;
 	bool use_split_kernel; /* Denotes if the device is going to run cycles using split-kernel */
 	vector<DeviceInfo> multi_devices;
 
@@ -66,6 +68,8 @@ public:
 		display_device = false;
 		advanced_shading = true;
 		has_bindless_textures = false;
+		has_volume_decoupled = false;
+		has_qbvh = false;
 		use_split_kernel = false;
 	}
 
@@ -364,6 +368,7 @@ public:
 private:
 	/* Indicted whether device types and devices lists were initialized. */
 	static bool need_types_update, need_devices_update;
+	static thread_mutex device_mutex;
 	static vector<DeviceType> types;
 	static vector<DeviceInfo> devices;
 };
diff --git a/intern/cycles/device/device_cpu.cpp b/intern/cycles/device/device_cpu.cpp
index ac6d3246d38..a17caabc850 100644
--- a/intern/cycles/device/device_cpu.cpp
+++ b/intern/cycles/device/device_cpu.cpp
@@ -1024,6 +1024,8 @@ void device_cpu_info(vector<DeviceInfo>& devices)
 	info.id = "CPU";
 	info.num = 0;
 	info.advanced_shading = true;
+	info.has_qbvh = system_cpu_support_sse2();
+	info.has_volume_decoupled = true;
 
 	devices.insert(devices.begin(), info);
 }
diff --git a/intern/cycles/device/device_cuda.cpp b/intern/cycles/device/device_cuda.cpp
index 3d209e5560c..066be82d55b 100644
--- a/intern/cycles/device/device_cuda.cpp
+++ b/intern/cycles/device/device_cuda.cpp
@@ -1313,9 +1313,14 @@ public:
 		CUdeviceptr d_work_tiles = cuda_device_ptr(work_tiles.device_pointer);
 
 		/* Prepare work size. More step samples render faster, but for now we
-		 * remain conservative to avoid driver timeouts. */
+		 * remain conservative for GPUs connected to a display to avoid driver
+		 * timeouts and display freezing. */
 		int min_blocks, num_threads_per_block;
 		cuda_assert(cuOccupancyMaxPotentialBlockSize(&min_blocks, &num_threads_per_block, cuPathTrace, NULL, 0, 0));
+		if(!info.display_device) {
+			min_blocks *= 8;
+		}
+
 		uint step_samples = divide_up(min_blocks * num_threads_per_block, wtile->w * wtile->h);;
 
 		/* Render all samples. */
@@ -2130,7 +2135,6 @@ void device_cuda_info(vector<DeviceInfo>& devices)
 
 	for(int num = 0; num < count; num++) {
 		char name[256];
-		int attr;
 
 		if(cuDeviceGetName(name, 256, num) != CUDA_SUCCESS)
 			continue;
@@ -2149,6 +2153,8 @@ void device_cuda_info(vector<DeviceInfo>& devices)
 
 		info.advanced_shading = (major >= 2);
 		info.has_bindless_textures = (major >= 3);
+		info.has_volume_decoupled = false;
+		info.has_qbvh = false;
 
 		int pci_location[3] = {0, 0, 0};
 		cuDeviceGetAttribute(&pci_location[0], CU_DEVICE_ATTRIBUTE_PCI_DOMAIN_ID, num);
@@ -2160,14 +2166,21 @@ void device_cuda_info(vector<DeviceInfo>& devices)
 		                        (unsigned int)pci_location[1],
 		                        (unsigned int)pci_location[2]);
 
-		/* if device has a kernel timeout, assume it is used for display */
-		if(cuDeviceGetAttribute(&attr, CU_DEVICE_ATTRIBUTE_KERNEL_EXEC_TIMEOUT, num) == CUDA_SUCCESS && attr == 1) {
+		/* If device has a kernel timeout and no compute preemption, we assume
+		 * it is connected to a display and will freeze the display while doing
+		 * computations. */
+		int timeout_attr = 0, preempt_attr = 0;
+		cuDeviceGetAttribute(&timeout_attr, CU_DEVICE_ATTRIBUTE_KERNEL_EXEC_TIMEOUT, num);
+		cuDeviceGetAttribute(&preempt_attr, CU_DEVICE_ATTRIBUTE_COMPUTE_PREEMPTION_SUPPORTED, num);
+
+		if(timeout_attr && !preempt_attr) {
 			info.description += " (Display)";
 			info.display_device = true;
 			display_devices.push_back(info);
 		}
-		else
+		else {
 			devices.push_back(info);
+		}
 	}
 
 	if(!display_devices.empty())
diff --git a/intern/cycles/device/device_network.cpp b/intern/cycles/device/device_network.cpp
index deea59f1d23..ced10c98dc9 100644
--- a/intern/cycles/device/device_network.cpp
+++ b/intern/cycles/device/device_network.cpp
@@ -343,7 +343,11 @@ void device_network_info(vector<DeviceInfo>& devices)
 	info.description = "Network Device";
 	info.id = "NETWORK";
 	info.num = 0;
-	info.advanced_shading = true; /* todo: get this info from device */
+
+	/* todo: get this info from device */
+	info.advanced_shading = true;
+	info.has_volume_decoupled = false;
+	info.has_qbvh = false;
 
 	devices.push_back(info);
 }
diff --git a/intern/cycles/device/device_opencl.cpp b/intern/cycles/device/device_opencl.cpp
index 9d89decaaaf..5808a31e605 100644
--- a/intern/cycles/device/device_opencl.cpp
+++ b/intern/cycles/device/device_opencl.cpp
@@ -123,6 +123,8 @@ void device_opencl_info(vector<DeviceInfo>& devices)
 		info.advanced_shading = OpenCLInfo::kernel_use_advanced_shading(platform_name);
 		info.use_split_kernel = OpenCLInfo::kernel_use_split(platform_name,
 		                                                     device_type);
+		info.has_volume_decoupled = false;
+		info.has_qbvh = false;
 		info.id = string("OPENCL_") + platform_name + "_" + device_name + "_" + hardware_id;
 		devices.push_back(info);
 		num_devices++;
diff --git a/intern/cycles/kernel/kernel_path.h b/intern/cycles/kernel/kernel_path.h
index 6b6c5603b70..652777a77a0 100644
--- a/intern/cycles/kernel/kernel_path.h
+++ b/intern/cycles/kernel/kernel_path.h
@@ -170,87 +170,90 @@ ccl_device_forceinline VolumeIntegrateResult kernel_path_volume(
 	if(!hit) {
 		kernel_volume_clean_stack(kg, state->volume_stack);
 	}
+
+	if(state->volume_stack[0].shader == SHADER_NONE) {
+		return VOLUME_PATH_ATTENUATED;
+	}
+
 	/* volume attenuation, emission, scatter */
-	if(state->volume_stack[0].shader != SHADER_NONE) {
-		Ray volume_ray = *ray;
-		volume_ray.t = (hit)? isect->t: FLT_MAX;
+	Ray volume_ray = *ray;
+	volume_ray.t = (hit)? isect->t: FLT_MAX;
 
-		bool heterogeneous = volume_stack_is_heterogeneous(kg, state->volume_stack);
+	bool heterogeneous = volume_stack_is_heterogeneous(kg, state->volume_stack);
 
 #  ifdef __VOLUME_DECOUPLED__
-		int sampling_method = volume_stack_sampling_method(kg, state->volume_stack);
-		bool direct = (state->flag & PATH_RAY_CAMERA) != 0;
-		bool decoupled = kernel_volume_use_decoupled(kg, heterogeneous, direct, sampling_method);
+	int sampling_method = volume_stack_sampling_method(kg, state->volume_stack);
+	bool direct = (state->flag & PATH_RAY_CAMERA) != 0;
+	bool decoupled = kernel_volume_use_decoupled(kg, heterogeneous, direct, sampling_method);
 
-		if(decoupled) {
-			/* cache steps along volume for repeated sampling */
-			VolumeSegment volume_segment;
+	if(decoupled) {
+		/* cache steps along volume for repeated sampling */
+		VolumeSegment volume_segment;
 
-			shader_setup_from_volume(kg, sd, &volume_ray);
-			kernel_volume_decoupled_record(kg, state,
-				&volume_ray, sd, &volume_segment, heterogeneous);
+		shader_setup_from_volume(kg, sd, &volume_ray);
+		kernel_volume_decoupled_record(kg, state,
+			&volume_ray, sd, &volume_segment, heterogeneous);
 
-			volume_segment.sampling_method = sampling_method;
+		volume_segment.sampling_method = sampling_method;
 
-			/* emission */
-			if(volume_segment.closure_flag & SD_EMISSION)
-				path_radiance_accum_emission(L, state, *throughput, volume_segment.accum_emission);
+		/* emission */
+		if(volume_segment.closure_flag & SD_EMISSION)
+			path_radiance_accum_emission(L, state, *throughput, volume_segment.accum_emission);
 
-			/* scattering */
-			VolumeIntegrateResult result = VOLUME_PATH_ATTENUATED;
+		/* scattering */
+		VolumeIntegrateResult result = VOLUME_PATH_ATTENUATED;
 
-			if(volume_segment.closure_flag & SD_SCATTER) {
-				int all = kernel_data.integrator.sample_all_lights_indirect;
+		if(volume_segment.closure_flag & SD_SCATTER) {
+			int all = kernel_data.integrator.sample_all_lights_indirect;
 
-				/* direct light sampling */
-				kernel_branched_path_volume_connect_light(kg, sd,
-					emission_sd, *throughput, state, L, all,
-					&volume_ray, &volume_segment);
+			/* direct light sampling */
+			kernel_branched_path_volume_connect_light(kg, sd,
+				emission_sd, *throughput, state, L, all,
+				&volume_ray, &volume_segment);
 
-				/* indirect sample. if we use distance sampling and take just
-				 * one sample for direct and indirect light, we could share
-				 * this computation, but makes code a bit complex */
-				float rphase = path_state_rng_1D(kg, state, PRNG_PHASE_CHANNEL);
-				float rscatter = path_state_rng_1D(kg, state, PRNG_SCATTER_DISTANCE);
+			/* indirect sample. if we use distance sampling and take just
+			 * one sample for direct and indirect light, we could share
+			 * this computation, but makes code a bit complex */
+			float rphase = path_state_rng_1D(kg, state, PRNG_PHASE_CHANNEL);
+			float rscatter = path_state_rng_1D(kg, state, PRNG_SCATTER_DISTANCE);
 
-				result = kernel_volume_decoupled_scatter(kg,
-					state, &volume_ray, sd, throughput,
-					rphase, rscatter, &volume_segment, NULL, true);
-			}
+			result = kernel_volume_decoupled_scatter(kg,
+				state, &volume_ray, sd, throughput,
+				rphase, rscatter, &volume_segment, NULL, true);
+		}
 
-			/* free cached steps */
-			kernel_volume_decoupled_free(kg, &volume_segment);
+		/* free cached steps */
+		kernel_volume_decoupled_free(kg, &volume_segment);
 
-			if(result == VOLUME_PATH_SCATTERED) {
-				if(kernel_path_volume_bounce(kg, sd, throughput, state, &L->state, ray))
-					return VOLUME_PATH_SCATTERED;
-				else
-					return VOLUME_PATH_MISSED;
-			}
-			else {
-				*throughput *= volume_segment.accum_transmittance;
-			}
+		if(result == VOLUME_PATH_SCATTERED) {
+			if(kernel_path_volume_bounce(kg, sd, throughput, state, &L->state, ray))
+				return VOLUME_PATH_SCATTERED;
+			else
+				return VOLUME_PATH_MISSED;
 		}
-		else
+		else {
+			*throughput *= volume_segment.accum_transmittance;
+		}
+	}
+	else
 #  endif  /* __VOLUME_DECOUPLED__ */
-		{
-			/* integrate along volume segment with distance sampling */
-			VolumeIntegrateResult result = kernel_volume_integrate(
-				kg, state, sd, &volume_ray, L, throughput, heterogeneous);
+	{
+		/* integrate along volume segment with distance sampling */
+		VolumeIntegrateResult result = kernel_volume_integrate(
+			kg, state, sd, &volume_ray, L, throughput, heterogeneous);
 
 #  ifdef __VOLUME_SCATTER__
-			if(result == VOLUME_PATH_SCATTERED) {
-				/* direct lighting */
-				kernel_path_volume_connect_light(kg, sd, emission_sd, *throughput, state, L);
-
-				/* indirect light bounce */
-				if(kernel_path_volume_bounce(kg, sd, throughput, state, &L->state, ray))
-					return VOLUME_PATH_SCATTERED;
-				else
-					return VOLUME_PATH_MISSED;
-			}
-#  endif  /* __VOLUME_SCATTER__ */
+		if(result == VOLUME_PATH_SCATTERED) {
+			/* direct lighting */
+			kernel_path_volume_connect_light(kg, sd, emission_sd, *throughput, state, L);
+
+			/* indirect light bounce */
+			if(kernel_path_volume_bounce(kg, sd, throughput, state, &L->state, ray))
+				return VOLUME_PATH_SCATTERED;
+			else
+				return VOLUME_PATH_MISSED;
 		}
+#  endif  /* __VOLUME_SCATTER__ */
 	}
 
 	return VOLUME_PATH_ATTENUATED;
diff --git a/intern/cycles/kernel/kernel_path_branched.h b/intern/cycles/kernel/kernel_path_branched.h
index 2597d684a36..42df7e85b41 100644
--- a/intern/cycles/kernel/kernel_path_branched.h
+++ b/intern/cycles/kernel/kernel_path_branched.h
@@ -64,6 +64,164 @@ ccl_device_inline void kernel_branched_path_ao(KernelGlobals *kg,
 
 #ifndef __SPLIT_KERNEL__
 
+#ifdef __VOLUME__
+ccl_device_forceinline void kernel_branched_path_volume(
+	KernelGlobals *kg,
+	ShaderData *sd,
+	PathState *state,
+	Ray *ray,
+	float3 *throughput,
+	ccl_addr_space Intersection *isect,
+	bool hit,
+	ShaderData *indirect_sd,
+	ShaderData *emission_sd,
+	PathRadiance *L)
+{
+	/* Sanitize volume stack. */
+	if(!hit) {
+		kernel_volume_clean_stack(kg, state->volume_stack);
+	}
+
+	if(state->volume_stack[0].shader == SHADER_NONE) {
+		return;
+	}
+
+	/* volume attenuation, emission, scatter */
+	Ray volume_ray = *ray;
+	volume_ray.t = (hit)? isect->t: FLT_MAX;
+
+	bool heterogeneous = volume_stack_is_heterogeneous(kg, state->volume_stack);
+
+#  ifdef __VOLUME_DECOUPLED__
+	/* decoupled ray marching only supported on CPU */
+	if(kernel_data.integrator.volume_decoupled) {
+		/* cache steps along volume for repeated sampling */
+		VolumeSegment volume_segment;
+
+		shader_setup_from_volume(kg, sd, &volume_ray);
+		kernel_volume_decoupled_record(kg, state,
+			&volume_ray, sd, &volume_segment, heterogeneous);
+
+		/* direct light sampling */
+		if(volume_segment.closure_flag & SD_SCATTER) {
+			volume_segment.sampling_method = volume_stack_sampling_method(kg, state->volume_stack);
+
+			int all = kernel_data.integrator.sample_all_lights_direct;
+
+			kernel_branched_path_volume_connect_light(kg, sd,
+				emission_sd, *throughput, state, L, all,
+				&volume_ray, &volume_segment);
+
+			/* indirect light sampling */
+			int num_samples = kernel_data.integrator.volume_samples;
+			float num_samples_inv = 1.0f/num_samples;
+
+			for(int j = 0; j < num_samples; j++) {
+				PathState ps = *state;
+				Ray pray = *ray;
+				float3 tp = *throughput;
+
+				/* branch RNG state */
+				path_state_branch(&ps, j, num_samples);
+
+				/* scatter sample. if we use distance sampling and take just one
+				 * sample for direct and indirect light, we could share this
+				 * computation, but makes code a bit complex */
+				float rphase = path_state_rng_1D(kg, &ps, PRNG_PHASE_CHANNEL);
+				float rscatter = path_state_rng_1D(kg, &ps, PRNG_SCATTER_DISTANCE);
+
+				VolumeIntegrateResult result = kernel_volume_decoupled_scatter(kg,
+					&ps, &pray, sd, &tp, rphase, rscatter, &volume_segment, NULL, false);
+
+				if(result == VOLUME_PATH_SCATTERED &&
+				   kernel_path_volume_bounce(kg,
+				                             sd,
+				                             &tp,
+				                             &ps,
+				                             &L->state,
+				                             &pray))
+				{
+					kernel_path_indirect(kg,
+					                     indirect_sd,
+					                     emission_sd,
+					                     &pray,
+					                     tp*num_samples_inv,
+					                     &ps,
+					                     L);
+
+					/* for render passes, sum and reset indirect light pass variables
+					 * for the next samples */
+					path_radiance_sum_indirect(L);
+					path_radiance_reset_indirect(L);
+				}
+			}
+		}
+
+		/* emission and transmittance */
+		if(volume_segment.closure_flag & SD_EMISSION)
+			path_radiance_accum_emission(L, state, *throughput, volume_segment.accum_emission);
+		*throughput *= volume_segment.accum_transmittance;
+
+		/* free cached steps */
+		kernel_volume_decoupled_free(kg, &volume_segment);
+	}
+	else
+#  endif  /* __VOLUME_DECOUPLED__ */
+	{
+		/* GPU: no decoupled ray marching, scatter probalistically */
+		int num_samples = kernel_data.integrator.volume_samples;
+		float num_samples_inv = 1.0f/num_samples;
+
+		/* todo: we should cache the shader evaluations from stepping
+		 * through the volume, for now we redo them multiple times */
+
+		for(int j = 0; j < num_samples; j++) {
+			PathState ps = *state;
+			Ray pray = *ray;
+			float3 tp = (*throughput) * num_samples_inv;
+
+			/* branch RNG state */
+			path_state_branch(&ps, j, num_samples);
+
+			VolumeIntegrateResult result = kernel_volume_integrate(
+				kg, &ps, sd, &volume_ray, L, &tp, heterogeneous);
+
+#  ifdef __VOLUME_SCATTER__
+			if(result == VOLUME_PATH_SCATTERED) {
+				/* todo: support equiangular, MIS and all light sampling.
+				 * alternatively get decoupled ray marching working on the GPU */
+				kernel_path_volume_connect_light(kg, sd, emission_sd, tp, state, L);
+
+				if(kernel_path_volume_bounce(kg,
+				                             sd,
+				                             &tp,
+				                             &ps,
+				                             &L->state,
+				                             &pray))
+				{
+					kernel_path_indirect(kg,
+					                     indirect_sd,
+					                     emission_sd,
+					                     &pray,
+					                     tp,
+					                     &ps,
+					                     L);
+
+					/* for render passes, sum and reset indirect light pass variables
+					 * for the next samples */
+					path_radiance_sum_indirect(L);
+					path_radiance_reset_indirect(L);
+				}
+			}
+# endif  /* __VOLUME_SCATTER__ */
+		}
+
+		/* todo: avoid this calculation using decoupled ray marching */
+		kernel_volume_shadow(kg, emission_sd, state, &volume_ray, throughput);
+	}
+}
+#endif  /* __VOLUME__ */
+
 /* bounce off surface and integrate indirect light */
 ccl_device_noinline void kernel_branched_path_surface_indirect_light(KernelGlobals *kg,
 	ShaderData *sd, ShaderData *indirect_sd, ShaderData *emission_sd,
@@ -293,142 +451,17 @@ ccl_device void kernel_branched_path_integrate(KernelGlobals *kg,
 		bool hit = kernel_path_scene_intersect(kg, &state, &ray, &isect, L);
 
 #ifdef __VOLUME__
-		/* Sanitize volume stack. */
-		if(!hit) {
-			kernel_volume_clean_stack(kg, state.volume_stack);
-		}
-		/* volume attenuation, emission, scatter */
-		if(state.volume_stack[0].shader != SHADER_NONE) {
-			Ray volume_ray = ray;
-			volume_ray.t = (hit)? isect.t: FLT_MAX;
-			
-			bool heterogeneous = volume_stack_is_heterogeneous(kg, state.volume_stack);
-
-#ifdef __VOLUME_DECOUPLED__
-			/* decoupled ray marching only supported on CPU */
-
-			/* cache steps along volume for repeated sampling */
-			VolumeSegment volume_segment;
-
-			shader_setup_from_volume(kg, &sd, &volume_ray);
-			kernel_volume_decoupled_record(kg, &state,
-				&volume_ray, &sd, &volume_segment, heterogeneous);
-
-			/* direct light sampling */
-			if(volume_segment.closure_flag & SD_SCATTER) {
-				volume_segment.sampling_method = volume_stack_sampling_method(kg, state.volume_stack);
-
-				int all = kernel_data.integrator.sample_all_lights_direct;
-
-				kernel_branched_path_volume_connect_light(kg, &sd,
-					&emission_sd, throughput, &state, L, all,
-					&volume_ray, &volume_segment);
-
-				/* indirect light sampling */
-				int num_samples = kernel_data.integrator.volume_samples;
-				float num_samples_inv = 1.0f/num_samples;
-
-				for(int j = 0; j < num_samples; j++) {
-					PathState ps = state;
-					Ray pray = ray;
-					float3 tp = throughput;
-
-					/* branch RNG state */
-					path_state_branch(&ps, j, num_samples);
-
-					/* scatter sample. if we use distance sampling and take just one
-					 * sample for direct and indirect light, we could share this
-					 * computation, but makes code a bit complex */
-					float rphase = path_state_rng_1D(kg, &ps, PRNG_PHASE_CHANNEL);
-					float rscatter = path_state_rng_1D(kg, &ps, PRNG_SCATTER_DISTANCE);
-
-					VolumeIntegrateResult result = kernel_volume_decoupled_scatter(kg,
-						&ps, &pray, &sd, &tp, rphase, rscatter, &volume_segment, NULL, false);
-
-					if(result == VOLUME_PATH_SCATTERED &&
-					   kernel_path_volume_bounce(kg,
-					                             &sd,
-					                             &tp,
-					                             &ps,
-					                             &L->state,
-					                             &pray))
-					{
-						kernel_path_indirect(kg,
-						                     &indirect_sd,
-						                     &emission_sd,
-						                     &pray,
-						                     tp*num_samples_inv,
-						                     &ps,
-						                     L);
-
-						/* for render passes, sum and reset indirect light pass variables
-						 * for the next samples */
-						path_radiance_sum_indirect(L);
-						path_radiance_reset_indirect(L);
-					}
-				}
-			}
-
-			/* emission and transmittance */
-			if(volume_segment.closure_flag & SD_EMISSION)
-				path_radiance_accum_emission(L, &state, throughput, volume_segment.accum_emission);
-			throughput *= volume_segment.accum_transmittance;
-
-			/* free cached steps */
-			kernel_volume_decoupled_free(kg, &volume_segment);
-#else
-			/* GPU: no decoupled ray marching, scatter probalistically */
-			int num_samples = kernel_data.integrator.volume_samples;
-			float num_samples_inv = 1.0f/num_samples;
-
-			/* todo: we should cache the shader evaluations from stepping
-			 * through the volume, for now we redo them multiple times */
-
-			for(int j = 0; j < num_samples; j++) {
-				PathState ps = state;
-				Ray pray = ray;
-				float3 tp = throughput * num_samples_inv;
-
-				/* branch RNG state */
-				path_state_branch(&ps, j, num_samples);
-
-				VolumeIntegrateResult result = kernel_volume_integrate(
-					kg, &ps, &sd, &volume_ray, L, &tp, heterogeneous);
-
-#ifdef __VOLUME_SCATTER__
-				if(result == VOLUME_PATH_SCATTERED) {
-					/* todo: support equiangular, MIS and all light sampling.
-					 * alternatively get decoupled ray marching working on the GPU */
-					kernel_path_volume_connect_light(kg, &sd, &emission_sd, tp, &state, L);
-
-					if(kernel_path_volume_bounce(kg,
-					                             &sd,
-					                             &tp,
-					                             &ps,
-					                             &L->state,
-					                             &pray))
-					{
-						kernel_path_indirect(kg,
-						                     &indirect_sd,
-						                     &emission_sd,
-						                     &pray,
-						                     tp,
-						                     &ps,
-						                     L);
-
-						/* for render passes, sum and reset indirect light pass variables
-						 * for the next samples */
-						path_radiance_sum_indirect(L);
-						path_radiance_reset_indirect(L);
-					}
-				}
-#endif  /* __VOLUME_SCATTER__ */
-			}
-
-			/* todo: avoid this calculation using decoupled ray marching */
-			kernel_volume_shadow(kg, &emission_sd, &state, &volume_ray, &throughput);
-#endif  /* __VOLUME_DECOUPLED__ */
-		}
+		/* Volume integration. */
+		kernel_branched_path_volume(kg,
+		                            &sd,
+		                            &state,
+		                            &ray,
+		                            &throughput,
+		                            &isect,
+		                            hit,
+		                            &indirect_sd,
+		                            &emission_sd,
+		                            L);
 #endif  /* __VOLUME__ */
 
 		/* Shade background. */
diff --git a/intern/cycles/kernel/kernel_types.h b/intern/cycles/kernel/kernel_types.h
index 19c77c1ed4f..f76d6c2e556 100644
--- a/intern/cycles/kernel/kernel_types.h
+++ b/intern/cycles/kernel/kernel_types.h
@@ -1262,6 +1262,7 @@ typedef struct KernelIntegrator {
 
 	/* branched path */
 	int branched;
+	int volume_decoupled;
 	int diffuse_samples;
 	int glossy_samples;
 	int transmission_samples;
@@ -1287,7 +1288,6 @@ typedef struct KernelIntegrator {
 	float light_inv_rr_threshold;
 
 	int start_sample;
-	int pad1;
 } KernelIntegrator;
 static_assert_align(KernelIntegrator, 16);
 
diff --git a/intern/cycles/kernel/kernel_volume.h b/intern/cycles/kernel/kernel_volume.h
index d9c310a893e..5905fb3bf12 100644
--- a/intern/cycles/kernel/kernel_volume.h
+++ b/intern/cycles/kernel/kernel_volume.h
@@ -1026,6 +1026,9 @@ ccl_device bool kernel_volume_use_decoupled(KernelGlobals *kg, bool heterogeneou
 	/* decoupled ray marching for heterogeneous volumes not supported on the GPU,
 	 * which also means equiangular and multiple importance sampling is not
 	 * support for that case */
+	if(!kernel_data.integrator.volume_decoupled)
+		return false;
+
 #ifdef __KERNEL_GPU__
 	if(heterogeneous)
 		return false;
diff --git a/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h b/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h
index 269e74f6164..b7be4fe4409 100644
--- a/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h
+++ b/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h
@@ -293,7 +293,7 @@ ccl_device float4 kernel_tex_image_interp(KernelGlobals *kg, int id, float x, fl
 	return r;
 }
 
-ccl_device float4 kernel_tex_image_interp_3d(KernelGlobals *kg, int id, float x, float y, float z)
+ccl_device float4 kernel_tex_image_interp_3d(KernelGlobals *kg, int id, float x, float y, float z, InterpolationType interp)
 {
 	float4 r;
 	switch(id) {
diff --git a/intern/cycles/render/integrator.cpp b/intern/cycles/render/integrator.cpp
index 15b728d6e02..b268478e6d3 100644
--- a/intern/cycles/render/integrator.cpp
+++ b/intern/cycles/render/integrator.cpp
@@ -145,6 +145,7 @@ void Integrator::device_update(Device *device, DeviceScene *dscene, Scene *scene
 	kintegrator->sample_clamp_indirect = (sample_clamp_indirect == 0.0f)? FLT_MAX: sample_clamp_indirect*3.0f;
 
 	kintegrator->branched = (method == BRANCHED_PATH);
+	kintegrator->volume_decoupled = device->info.has_volume_decoupled;
 	kintegrator->diffuse_samples = diffuse_samples;
 	kintegrator->glossy_samples = glossy_samples;
 	kintegrator->transmission_samples = transmission_samples;
diff --git a/intern/cycles/render/mesh.cpp b/intern/cycles/render/mesh.cpp
index 84537bf5993..c02a5222463 100644
--- a/intern/cycles/render/mesh.cpp
+++ b/intern/cycles/render/mesh.cpp
@@ -1016,7 +1016,8 @@ void Mesh::pack_patches(uint *patch_data, uint vert_offset, uint face_offset, ui
 	}
 }
 
-void Mesh::compute_bvh(DeviceScene *dscene,
+void Mesh::compute_bvh(Device *device,
+                       DeviceScene *dscene,
                        SceneParams *params,
                        Progress *progress,
                        int n,
@@ -1050,7 +1051,7 @@ void Mesh::compute_bvh(DeviceScene *dscene,
 
 			BVHParams bparams;
 			bparams.use_spatial_split = params->use_bvh_spatial_split;
-			bparams.use_qbvh = params->use_qbvh;
+			bparams.use_qbvh = params->use_qbvh && device->info.has_qbvh;
 			bparams.use_unaligned_nodes = dscene->data.bvh.have_curves &&
 			                              params->use_bvh_unaligned_nodes;
 			bparams.num_motion_triangle_steps = params->num_bvh_time_steps;
@@ -1814,18 +1815,18 @@ void MeshManager::device_update_bvh(Device *device, DeviceScene *dscene, Scene *
 	/* bvh build */
 	progress.set_status("Updating Scene BVH", "Building");
 
-	VLOG(1) << (scene->params.use_qbvh ? "Using QBVH optimization structure"
-	                                   : "Using regular BVH optimization structure");
-
 	BVHParams bparams;
 	bparams.top_level = true;
-	bparams.use_qbvh = scene->params.use_qbvh;
+	bparams.use_qbvh = scene->params.use_qbvh && device->info.has_qbvh;
 	bparams.use_spatial_split = scene->params.use_bvh_spatial_split;
 	bparams.use_unaligned_nodes = dscene->data.bvh.have_curves &&
 	                              scene->params.use_bvh_unaligned_nodes;
 	bparams.num_motion_triangle_steps = scene->params.num_bvh_time_steps;
 	bparams.num_motion_curve_steps = scene->params.num_bvh_time_steps;
 
+	VLOG(1) << (bparams.use_qbvh ? "Using QBVH optimization structure"
+	                             : "Using regular BVH optimization structure");
+
 	delete bvh;
 	bvh = BVH::create(bparams, scene->objects);
 	bvh->build(progress);
@@ -1879,7 +1880,7 @@ void MeshManager::device_update_bvh(Device *device, DeviceScene *dscene, Scene *
 	}
 
 	dscene->data.bvh.root = pack.root_index;
-	dscene->data.bvh.use_qbvh = scene->params.use_qbvh;
+	dscene->data.bvh.use_qbvh = bparams.use_qbvh;
 	dscene->data.bvh.use_bvh_steps = (scene->params.num_bvh_time_steps != 0);
 }
 
@@ -2084,6 +2085,7 @@ void MeshManager::device_update(Device *device, DeviceScene *dscene, Scene *scen
 		if(mesh->need_update) {
 			pool.push(function_bind(&Mesh::compute_bvh,
 			                        mesh,
+			                        device,
 			                        dscene,
 			                        &scene->params,
 			                        &progress,
diff --git a/intern/cycles/render/mesh.h b/intern/cycles/render/mesh.h
index 043ce9d0ffc..9a51ca73950 100644
--- a/intern/cycles/render/mesh.h
+++ b/intern/cycles/render/mesh.h
@@ -282,7 +282,8 @@ public:
 	void pack_curves(Scene *scene, float4 *curve_key_co, float4 *curve_data, size_t curvekey_offset);
 	void pack_patches(uint *patch_data, uint vert_offset, uint face_offset, uint corner_offset);
 
-	void compute_bvh(DeviceScene *dscene,
+	void compute_bvh(Device *device,
+	                 DeviceScene *dscene,
 	                 SceneParams *params,
 	                 Progress *progress,
 	                 int n,
diff --git a/intern/cycles/render/scene.h b/intern/cycles/render/scene.h
index 0194327f567..a1966afd23b 100644
--- a/intern/cycles/render/scene.h
+++ b/intern/cycles/render/scene.h
@@ -149,7 +149,7 @@ public:
 		use_bvh_spatial_split = false;
 		use_bvh_unaligned_nodes = true;
 		num_bvh_time_steps = 0;
-		use_qbvh = false;
+		use_qbvh = true;
 		persistent_data = false;
 		texture_limit = 0;
 	}
diff --git a/intern/cycles/render/shader.cpp b/intern/cycles/render/shader.cpp
index 864875361c0..3992ada2e85 100644
--- a/intern/cycles/render/shader.cpp
+++ b/intern/cycles/render/shader.cpp
@@ -451,10 +451,12 @@ void ShaderManager::device_update_common(Device *device,
 			flag |= SD_HETEROGENEOUS_VOLUME;
 		if(shader->has_bssrdf_bump)
 			flag |= SD_HAS_BSSRDF_BUMP;
-		if(shader->volume_sampling_method == VOLUME_SAMPLING_EQUIANGULAR)
-			flag |= SD_VOLUME_EQUIANGULAR;
-		if(shader->volume_sampling_method == VOLUME_SAMPLING_MULTIPLE_IMPORTANCE)
-			flag |= SD_VOLUME_MIS;
+		if(device->info.has_volume_decoupled) {
+			if(shader->volume_sampling_method == VOLUME_SAMPLING_EQUIANGULAR)
+				flag |= SD_VOLUME_EQUIANGULAR;
+			if(shader->volume_sampling_method == VOLUME_SAMPLING_MULTIPLE_IMPORTANCE)
+				flag |= SD_VOLUME_MIS;
+		}
 		if(shader->volume_interpolation_method == VOLUME_INTERPOLATION_CUBIC)
 			flag |= SD_VOLUME_CUBIC;
 		if(shader->has_bump)
diff --git a/release/scripts/startup/bl_ui/space_sequencer.py b/release/scripts/startup/bl_ui/space_sequencer.py
index 06dd90685b7..82f83c2ddc9 100644
--- a/release/scripts/startup/bl_ui/space_sequencer.py
+++ b/release/scripts/startup/bl_ui/space_sequencer.py
@@ -21,10 +21,10 @@ import bpy
 from bpy.types import Header, Menu, Panel
 from rna_prop_ui import PropertyPanel
 from bl_ui.properties_grease_pencil_common import (
-        GreasePencilDataPanel,
-        GreasePencilPaletteColorPanel,
-        GreasePencilToolsPanel,
-        )
+    GreasePencilDataPanel,
+    GreasePencilPaletteColorPanel,
+    GreasePencilToolsPanel,
+)
 from bpy.app.translations import pgettext_iface as iface_
 
 
@@ -44,7 +44,7 @@ def draw_color_balance(layout, color_balance):
     col.separator()
     col.prop(color_balance, "lift", text="")
     col.prop(color_balance, "invert_lift", text="Invert", icon='ARROW_LEFTRIGHT')
-    split.template_color_picker(color_balance, "lift", value_slider=True,  cubic=True)
+    split.template_color_picker(color_balance, "lift", value_slider=True, cubic=True)
 
     box = layout.box()
     split = box.split(percentage=0.35)
@@ -197,14 +197,18 @@ class SEQUENCER_MT_view(Menu):
             layout.operator_context = 'INVOKE_DEFAULT'
         if is_preview:
             layout.operator_context = 'INVOKE_REGION_PREVIEW'
-            layout.operator("sequencer.view_all_preview", text="Fit Preview in Window")
+            layout.operator("sequencer.view_all_preview", text="Fit Preview in window")
 
             layout.separator()
 
             ratios = ((1, 8), (1, 4), (1, 2), (1, 1), (2, 1), (4, 1), (8, 1))
 
             for a, b in ratios:
-                layout.operator("sequencer.view_zoom_ratio", text=iface_("Zoom %d:%d") % (a, b), translate=False).ratio = a / b
+                layout.operator(
+                    "sequencer.view_zoom_ratio",
+                    text=iface_("Zoom %d:%d") % (a, b),
+                    translate=False,
+                ).ratio = a / b
 
             layout.separator()
 
@@ -276,30 +280,6 @@ class SEQUENCER_MT_marker(Menu):
         marker_menu_generic(layout)
 
 
-class SEQUENCER_MT_change(Menu):
-    bl_label = "Change"
-
-    def draw(self, context):
-        layout = self.layout
-        strip = act_strip(context)
-
-        layout.operator_context = 'INVOKE_REGION_WIN'
-
-        layout.operator_menu_enum("sequencer.change_effect_input", "swap")
-        layout.operator_menu_enum("sequencer.change_effect_type", "type")
-        prop = layout.operator("sequencer.change_path", text="Path/Files")
-
-        if strip:
-            stype = strip.type
-
-            if stype == 'IMAGE':
-                prop.filter_image = True
-            elif stype == 'MOVIE':
-                prop.filter_movie = True
-            elif stype == 'SOUND':
-                prop.filter_sound = True
-
-
 class SEQUENCER_MT_frame(Menu):
     bl_label = "Frame"
 
@@ -388,87 +368,124 @@ class SEQUENCER_MT_add_effect(Menu):
         layout.operator("sequencer.effect_strip_add", text="Adjustment Layer").type = 'ADJUSTMENT'
 
 
-class SEQUENCER_MT_strip(Menu):
-    bl_label = "Strip"
+class SEQUENCER_MT_strip_transform(Menu):
+    bl_label = "Transform"
 
     def draw(self, context):
         layout = self.layout
 
-        layout.operator_context = 'INVOKE_REGION_WIN'
-
         layout.operator("transform.transform", text="Grab/Move").mode = 'TRANSLATION'
         layout.operator("transform.transform", text="Grab/Extend from Frame").mode = 'TIME_EXTEND'
-        layout.operator("sequencer.gap_remove").all = False
-        layout.operator("sequencer.gap_insert")
+        layout.operator("sequencer.slip", text="Slip Strip Contents")
 
-        #  uiItemO(layout, NULL, 0, "sequencer.strip_snap"); // TODO - add this operator
         layout.separator()
+        layout.operator_menu_enum("sequencer.swap", "side")
 
-        layout.operator("sequencer.cut", text="Cut (Hard) at Frame").type = 'HARD'
-        layout.operator("sequencer.cut", text="Cut (Soft) at Frame").type = 'SOFT'
-        layout.operator("sequencer.slip", text="Slip Strip Contents")
-        layout.operator("sequencer.images_separate")
-        layout.operator("sequencer.offset_clear")
-        layout.operator("sequencer.deinterlace_selected_movies")
-        layout.operator("sequencer.rebuild_proxy")
         layout.separator()
+        layout.operator("sequencer.gap_remove").all = False
+        layout.operator("sequencer.gap_insert")
 
-        layout.operator("sequencer.duplicate_move")
-        layout.operator("sequencer.delete")
 
+class SEQUENCER_MT_strip_input(Menu):
+    bl_label = "Inputs"
+
+    def draw(self, context):
+        layout = self.layout
         strip = act_strip(context)
 
+        layout.operator("sequencer.reload", text="Reload Strips")
+        layout.operator("sequencer.reload", text="Reload Strips and Adjust Length").adjust_length = True
+        prop = layout.operator("sequencer.change_path", text="Change Path/Files")
+        layout.operator("sequencer.swap_data", text="Swap Data")
+
         if strip:
             stype = strip.type
 
-            # XXX note strip.type is never equal to 'EFFECT', look at seq_type_items within rna_sequencer.c
-            if stype == 'EFFECT':
-                pass
-                # layout.separator()
-                # layout.operator("sequencer.effect_change")
-                # layout.operator("sequencer.effect_reassign_inputs")
-            elif stype == 'IMAGE':
-                layout.separator()
-                # layout.operator("sequencer.image_change")
-                layout.operator("sequencer.rendersize")
-            elif stype == 'SCENE':
-                pass
-                # layout.separator()
-                # layout.operator("sequencer.scene_change", text="Change Scene")
+            if stype == 'IMAGE':
+                prop.filter_image = True
             elif stype == 'MOVIE':
-                layout.separator()
-                # layout.operator("sequencer.movie_change")
-                layout.operator("sequencer.rendersize")
+                prop.filter_movie = True
             elif stype == 'SOUND':
-                layout.separator()
-                layout.operator("sequencer.crossfade_sounds")
+                prop.filter_sound = True
 
-        layout.separator()
-        layout.operator("sequencer.meta_make")
-        layout.operator("sequencer.meta_separate")
 
-        layout.separator()
-        layout.operator("sequencer.reload", text="Reload Strips")
-        layout.operator("sequencer.reload", text="Reload Strips and Adjust Length").adjust_length = True
-        layout.operator("sequencer.reassign_inputs")
-        layout.operator("sequencer.swap_inputs")
+class SEQUENCER_MT_strip_lock_mute(Menu):
+    bl_label = "Lock/Mute"
+
+    def draw(self, context):
+        layout = self.layout
 
-        layout.separator()
         layout.operator("sequencer.lock")
         layout.operator("sequencer.unlock")
         layout.operator("sequencer.mute").unselected = False
         layout.operator("sequencer.unmute").unselected = False
-
         layout.operator("sequencer.mute", text="Mute Deselected Strips").unselected = True
 
+
+class SEQUENCER_MT_strip(Menu):
+    bl_label = "Strip"
+
+    def draw(self, context):
+        layout = self.layout
+
+        layout.operator_context = 'INVOKE_REGION_WIN'
+
+        layout.operator("ed.undo")
+        layout.operator("ed.redo")
+        layout.operator("ed.undo_history")
+
+        layout.separator()
+        layout.menu("SEQUENCER_MT_strip_transform")
         layout.operator("sequencer.snap")
+        layout.operator("sequencer.offset_clear")
 
-        layout.operator_menu_enum("sequencer.swap", "side")
+        layout.separator()
+        layout.operator("sequencer.duplicate_move")
+        layout.operator("sequencer.delete", text="Delete...")
 
         layout.separator()
+        layout.operator("sequencer.cut", text="Cut (Hard) at frame").type = 'HARD'
+        layout.operator("sequencer.cut", text="Cut (Soft) at frame").type = 'SOFT'
 
-        layout.operator("sequencer.swap_data")
-        layout.menu("SEQUENCER_MT_change")
+        layout.separator()
+        layout.operator("sequencer.deinterlace_selected_movies")
+        layout.operator("sequencer.rebuild_proxy")
+
+        strip = act_strip(context)
+
+        if strip:
+            stype = strip.type
+
+            if stype in {
+                    'CROSS', 'ADD', 'SUBTRACT', 'ALPHA_OVER', 'ALPHA_UNDER',
+                    'GAMMA_CROSS', 'MULTIPLY', 'OVER_DROP', 'WIPE', 'GLOW',
+                    'TRANSFORM', 'COLOR', 'SPEED', 'MULTICAM', 'ADJUSTMENT',
+                    'GAUSSIAN_BLUR', 'TEXT',
+            }:
+                layout.separator()
+                layout.operator_menu_enum("sequencer.change_effect_input", "swap")
+                layout.operator_menu_enum("sequencer.change_effect_type", "type")
+                layout.operator("sequencer.reassign_inputs")
+                layout.operator("sequencer.swap_inputs")
+            elif stype in {'IMAGE', 'MOVIE'}:
+                layout.separator()
+                layout.operator("sequencer.rendersize")
+                layout.operator("sequencer.images_separate")
+            elif stype == 'SOUND':
+                layout.separator()
+                layout.operator("sequencer.crossfade_sounds")
+            elif stype == 'META':
+                layout.separator()
+                layout.operator("sequencer.meta_separate")
+
+        layout.separator()
+        layout.operator("sequencer.meta_make")
+
+        layout.separator()
+        layout.menu("SEQUENCER_MT_strip_input")
+
+        layout.separator()
+        layout.menu("SEQUENCER_MT_strip_lock_mute")
 
 
 class SequencerButtonsPanel:
@@ -532,7 +549,6 @@ class SEQUENCER_PT_edit(SequencerButtonsPanel, Panel):
             row = layout.row()
             row.prop(strip, "mute", toggle=True, icon_only=True, icon='MUTE_IPO_OFF')
 
-
         col = layout.column(align=True)
         row = col.row(align=True)
 
@@ -582,10 +598,12 @@ class SEQUENCER_PT_effect(SequencerButtonsPanel, Panel):
         if not strip:
             return False
 
-        return strip.type in {'ADD', 'SUBTRACT', 'ALPHA_OVER', 'ALPHA_UNDER',
-                              'CROSS', 'GAMMA_CROSS', 'MULTIPLY', 'OVER_DROP',
-                              'WIPE', 'GLOW', 'TRANSFORM', 'COLOR', 'SPEED',
-                              'MULTICAM', 'GAUSSIAN_BLUR', 'TEXT'}
+        return strip.type in {
+            'ADD', 'SUBTRACT', 'ALPHA_OVER', 'ALPHA_UNDER',
+            'CROSS', 'GAMMA_CROSS', 'MULTIPLY', 'OVER_DROP',
+            'WIPE', 'GLOW', 'TRANSFORM', 'COLOR', 'SPEED',
+            'MULTICAM', 'GAUSSIAN_BLUR', 'TEXT',
+        }
 
     def draw(self, context):
         layout = self.layout
@@ -700,7 +718,6 @@ class SEQUENCER_PT_effect(SequencerButtonsPanel, Panel):
                 col.separator()
                 col.label(text="Two or more channels are needed below this strip", icon='INFO')
 
-
         elif strip.type == 'TEXT':
             col = layout.column()
             col.prop(strip, "text")
@@ -748,11 +765,13 @@ class SEQUENCER_PT_input(SequencerButtonsPanel, Panel):
         if not strip:
             return False
 
-        return strip.type in {'MOVIE', 'IMAGE', 'SCENE', 'MOVIECLIP', 'META',
-                              'ADD', 'SUBTRACT', 'ALPHA_OVER', 'ALPHA_UNDER',
-                              'CROSS', 'GAMMA_CROSS', 'MULTIPLY', 'OVER_DROP',
-                              'WIPE', 'GLOW', 'TRANSFORM', 'COLOR',
-                              'MULTICAM', 'SPEED', 'ADJUSTMENT'}
+        return strip.type in {
+            'MOVIE', 'IMAGE', 'SCENE', 'MOVIECLIP', 'META',
+            'ADD', 'SUBTRACT', 'ALPHA_OVER', 'ALPHA_UNDER',
+            'CROSS', 'GAMMA_CROSS', 'MULTIPLY', 'OVER_DROP',
+            'WIPE', 'GLOW', 'TRANSFORM', 'COLOR',
+            'MULTICAM', 'SPEED', 'ADJUSTMENT',
+        }
 
     def draw(self, context):
         layout = self.layout
@@ -985,11 +1004,13 @@ class SEQUENCER_PT_filter(SequencerButtonsPanel, Panel):
         if not strip:
             return False
 
-        return strip.type in {'MOVIE', 'IMAGE', 'SCENE', 'MOVIECLIP', 'MASK',
-                              'META', 'ADD', 'SUBTRACT', 'ALPHA_OVER',
-                              'ALPHA_UNDER', 'CROSS', 'GAMMA_CROSS', 'MULTIPLY',
-                              'OVER_DROP', 'WIPE', 'GLOW', 'TRANSFORM', 'COLOR',
-                              'MULTICAM', 'SPEED', 'ADJUSTMENT'}
+        return strip.type in {
+            'MOVIE', 'IMAGE', 'SCENE', 'MOVIECLIP', 'MASK',
+            'META', 'ADD', 'SUBTRACT', 'ALPHA_OVER',
+            'ALPHA_UNDER', 'CROSS', 'GAMMA_CROSS', 'MULTIPLY',
+            'OVER_DROP', 'WIPE', 'GLOW', 'TRANSFORM', 'COLOR',
+            'MULTICAM', 'SPEED', 'ADJUSTMENT',
+        }
 
     def draw(self, context):
         layout = self.layout
@@ -1269,11 +1290,13 @@ classes = (
     SEQUENCER_MT_view_toggle,
     SEQUENCER_MT_select,
     SEQUENCER_MT_marker,
-    SEQUENCER_MT_change,
     SEQUENCER_MT_frame,
     SEQUENCER_MT_add,
     SEQUENCER_MT_add_effect,
     SEQUENCER_MT_strip,
+    SEQUENCER_MT_strip_transform,
+    SEQUENCER_MT_strip_input,
+    SEQUENCER_MT_strip_lock_mute,
     SEQUENCER_PT_edit,
     SEQUENCER_PT_effect,
     SEQUENCER_PT_input,
diff --git a/source/blender/editors/sculpt_paint/paint_cursor.c b/source/blender/editors/sculpt_paint/paint_cursor.c
index befb635cfc4..2d2d5fa33c9 100644
--- a/source/blender/editors/sculpt_paint/paint_cursor.c
+++ b/source/blender/editors/sculpt_paint/paint_cursor.c
@@ -1025,7 +1025,7 @@ static void paint_draw_cursor(bContext *C, int x, int y, void *UNUSED(unused))
 	ViewContext vc;
 	view3d_set_viewcontext(C, &vc);
 
-	if (vc.rv3d->rflag & RV3D_NAVIGATING) {
+	if (vc.rv3d && (vc.rv3d->rflag & RV3D_NAVIGATING)) {
 		return;
 	}
 
diff --git a/source/blender/editors/sculpt_paint/paint_vertex.c b/source/blender/editors/sculpt_paint/paint_vertex.c
index 3fa1eda5d1e..7a0c6999623 100644
--- a/source/blender/editors/sculpt_paint/paint_vertex.c
+++ b/source/blender/editors/sculpt_paint/paint_vertex.c
@@ -310,78 +310,29 @@ static uint vpaint_blend(
 	return color_blend;
 }
 
-
-/* whats _dl mean? */
-static float calc_vp_strength_col_dl(
+static void tex_color_alpha(
         VPaint *vp, const ViewContext *vc, const float co[3],
-        const float mval[2], const float brush_size_pressure, float rgba[4])
+        float r_rgba[4])
 {
-	float co_ss[2];  /* screenspace */
-
-	if (ED_view3d_project_float_object(
-	        vc->ar,
-	        co, co_ss,
-	        V3D_PROJ_TEST_CLIP_BB | V3D_PROJ_TEST_CLIP_NEAR) == V3D_PROJ_RET_OK)
-	{
-		const float dist_sq = len_squared_v2v2(mval, co_ss);
-
-		if (dist_sq <= SQUARE(brush_size_pressure)) {
-			Brush *brush = BKE_paint_brush(&vp->paint);
-			const float dist = sqrtf(dist_sq);
-			float factor;
-
-			if (brush->mtex.tex && rgba) {
-				if (brush->mtex.brush_map_mode == MTEX_MAP_MODE_3D) {
-					BKE_brush_sample_tex_3D(vc->scene, brush, co, rgba, 0, NULL);
-				}
-				else {
-					const float co_ss_3d[3] = {co_ss[0], co_ss[1], 0.0f};  /* we need a 3rd empty value */
-					BKE_brush_sample_tex_3D(vc->scene, brush, co_ss_3d, rgba, 0, NULL);
-				}
-				factor = rgba[3];
-			}
-			else {
-				factor = 1.0f;
-			}
-			return factor * BKE_brush_curve_strength_clamped(brush, dist, brush_size_pressure);
-		}
+	const Brush *brush = BKE_paint_brush(&vp->paint);
+	BLI_assert(brush->mtex.tex != NULL);
+	if (brush->mtex.brush_map_mode == MTEX_MAP_MODE_3D) {
+		BKE_brush_sample_tex_3D(vc->scene, brush, co, r_rgba, 0, NULL);
 	}
-	if (rgba)
-		zero_v4(rgba);
-	return 0.0f;
-}
-
-static float calc_vp_alpha_col_dl(
-        VPaint *vp, const ViewContext *vc,
-        float vpimat[3][3], const DMCoNo *v_co_no,
-        const float mval[2],
-        const float brush_size_pressure, const float brush_alpha_pressure, float rgba[4])
-{
-	float strength = calc_vp_strength_col_dl(vp, vc, v_co_no->co, mval, brush_size_pressure, rgba);
-
-	if (strength > 0.0f) {
-		float alpha = brush_alpha_pressure * strength;
-
-		if ((vp->paint.brush->flag & BRUSH_FRONTFACE_FALLOFF) != 0) {
-			float dvec[3];
-
-			/* transpose ! */
-			dvec[2] = dot_v3v3(vpimat[2], v_co_no->no);
-			if (dvec[2] > 0.0f) {
-				dvec[0] = dot_v3v3(vpimat[0], v_co_no->no);
-				dvec[1] = dot_v3v3(vpimat[1], v_co_no->no);
-
-				alpha *= dvec[2] / len_v3(dvec);
-			}
-			else {
-				return 0.0f;
-			}
+	else {
+		float co_ss[2];  /* screenspace */
+		if (ED_view3d_project_float_object(
+		        vc->ar,
+		        co, co_ss,
+		        V3D_PROJ_TEST_CLIP_BB | V3D_PROJ_TEST_CLIP_NEAR) == V3D_PROJ_RET_OK)
+		{
+			const float co_ss_3d[3] = {co_ss[0], co_ss[1], 0.0f};  /* we need a 3rd empty value */
+			BKE_brush_sample_tex_3D(vc->scene, brush, co_ss_3d, r_rgba, 0, NULL);
+		}
+		else {
+			zero_v4(r_rgba);
 		}
-
-		return alpha;
 	}
-
-	return 0.0f;
 }
 
 /* vpaint has 'vpaint_blend' */
@@ -1195,8 +1146,6 @@ struct WPaintData {
 
 	struct WeightPaintGroupData active, mirror;
 
-	float wpimat[3][3];
-
 	/* variables for auto normalize */
 	const bool *vgroup_validmap; /* stores if vgroups tie to deforming bones or not */
 	const bool *lock_flags;
@@ -1338,8 +1287,6 @@ static bool wpaint_stroke_test_start(bContext *C, wmOperator *op, const float mo
 	VPaint *vp = CTX_data_tool_settings(C)->wpaint;
 	EvaluationContext eval_ctx;
 
-	float mat[4][4], imat[4][4];
-
 	if (ED_wpaint_ensure_data(C, op->reports, WPAINT_ENSURE_MIRROR, &vgroup_index) == false) {
 		return false;
 	}
@@ -1443,11 +1390,6 @@ static bool wpaint_stroke_test_start(bContext *C, wmOperator *op, const float mo
 		wpd->precomputed_weight = MEM_mallocN(sizeof(float) * me->totvert, __func__);
 	}
 
-	/* imat for normals */
-	mul_m4_m4m4(mat, wpd->vc.rv3d->viewmat, ob->obmat);
-	invert_m4_m4(imat, mat);
-	copy_m3_m4(wpd->wpimat, imat);
-
 	/* If not previously created, create vertex/weight paint mode session data */
 	vertex_paint_init_session(&eval_ctx, scene, ob);
 	vwpaint_update_cache_invariants(C, vp, ss, op, mouse);
@@ -2361,8 +2303,6 @@ struct VPaintData {
 	struct VertProjHandle *vp_handle;
 	struct DMCoNo *vertexcosnos;
 
-	float vpimat[3][3];
-
 	/* modify 'me->mcol' directly, since the derived mesh is drawing from this
 	 * array, otherwise we need to refresh the modifier stack */
 	bool use_fast_update;
@@ -2373,7 +2313,7 @@ struct VPaintData {
 
 	bool is_texbrush;
 
-	/* Special storage for smear brush, avoid feedback loop - update each step and swap. */
+	/* Special storage for smear brush, avoid feedback loop - update each step. */
 	struct {
 		uint *color_prev;
 		uint *color_curr;
@@ -2390,7 +2330,6 @@ static bool vpaint_stroke_test_start(bContext *C, struct wmOperator *op, const f
 	struct VPaintData *vpd;
 	Object *ob = CTX_data_active_object(C);
 	Mesh *me;
-	float mat[4][4], imat[4][4];
 	SculptSession *ss = ob->sculpt;
 	EvaluationContext eval_ctx;
 
@@ -2446,11 +2385,6 @@ static bool vpaint_stroke_test_start(bContext *C, struct wmOperator *op, const f
 		ob->sculpt->building_vp_handle = false;
 	}
 
-	/* some old cruft to sort out later */
-	mul_m4_m4m4(mat, vpd->vc.rv3d->viewmat, ob->obmat);
-	invert_m4_m4(imat, mat);
-	copy_m3_m4(vpd->vpimat, imat);
-
 	/* If not previously created, create vertex/weight paint mode session data */
 	vertex_paint_init_session(&eval_ctx, scene, ob);
 	vwpaint_update_cache_invariants(C, vp, ss, op, mouse);
@@ -2512,23 +2446,17 @@ static void do_vpaint_brush_calc_average_color_cb_ex(
 	BKE_pbvh_vertex_iter_end;
 }
 
-static void handle_texture_brush(
-        SculptThreadedTaskData *data, PBVHVertexIter vd, float size_pressure, float alpha_pressure,
-        float *r_alpha, uint *r_color)
+static float tex_color_alpha_ubyte(
+        SculptThreadedTaskData *data, const float v_co[3],
+        uint *r_color)
 {
-	SculptSession *ss = data->ob->sculpt;
-	CCGDerivedMesh *ccgdm = BKE_pbvh_get_ccgdm(ss->pbvh);
-	const int v_index = ccgdm ? data->me->mloop[vd.grid_indices[vd.g]].v : vd.vert_indices[vd.i];
-
 	float rgba[4];
 	float rgba_br[3];
-
-	*r_alpha = calc_vp_alpha_col_dl(
-	        data->vp, &data->vpd->vc, data->vpd->vpimat,
-	        &data->vpd->vertexcosnos[v_index], ss->cache->mouse, size_pressure, alpha_pressure, rgba);
+	tex_color_alpha(data->vp, &data->vpd->vc, v_co, rgba);
 	rgb_uchar_to_float(rgba_br, (const uchar *)&data->vpd->paintcol);
 	mul_v3_v3(rgba_br, rgba);
 	rgb_float_to_uchar((uchar *)r_color, rgba_br);
+	return rgba[3];
 }
 
 static void do_vpaint_brush_draw_task_cb_ex(
@@ -2586,9 +2514,10 @@ static void do_vpaint_brush_draw_task_cb_ex(
 					/* If we're painting with a texture, sample the texture color and alpha. */
 					float tex_alpha = 1.0;
 					if (data->vpd->is_texbrush) {
-						handle_texture_brush(
-						        data, vd, brush_size_pressure, brush_alpha_pressure,
-						        &tex_alpha, &color_final);
+						/* Note: we may want to paint alpha as vertex color alpha. */
+						tex_alpha = tex_color_alpha_ubyte(
+						        data, data->vpd->vertexcosnos[v_index].co,
+						        &color_final);
 					}
 					/* For each poly owning this vert, paint each loop belonging to this vert. */
 					for (int j = 0; j < gmap->vert_to_poly[v_index].count; j++) {
@@ -3032,7 +2961,7 @@ static void vpaint_stroke_update_step(bContext *C, struct PaintStroke *stroke, P
 	BKE_mesh_batch_cache_dirty(ob->data, BKE_MESH_BATCH_DIRTY_ALL);
 
 	if (vp->paint.brush->vertexpaint_tool == PAINT_BLEND_SMEAR) {
-		SWAP(uint *, vpd->smear.color_curr, vpd->smear.color_prev);
+		memcpy(vpd->smear.color_prev, vpd->smear.color_curr, sizeof(uint) * ((Mesh *)ob->data)->totloop);
 	}
 
 	/* calculate pivot for rotation around seletion if needed */
@@ -3058,6 +2987,10 @@ static void vpaint_stroke_done(const bContext *C, struct PaintStroke *stroke)
 	ViewContext *vc = &vpd->vc;
 	Object *ob = vc->obact;
 
+	if (vpd->is_texbrush) {
+		ED_vpaint_proj_handle_free(vpd->vp_handle);
+	}
+
 	if (vpd->mlooptag)
 		MEM_freeN(vpd->mlooptag);
 	if (vpd->smear.color_prev)
diff --git a/source/blender/editors/sculpt_paint/sculpt.c b/source/blender/editors/sculpt_paint/sculpt.c
index fb5192b8072..dff536f91f2 100644
--- a/source/blender/editors/sculpt_paint/sculpt.c
+++ b/source/blender/editors/sculpt_paint/sculpt.c
@@ -941,7 +941,7 @@ static void calc_area_center(
 
 	/* Intentionally set 'sd' to NULL since we share logic with vertex paint. */
 	SculptThreadedTaskData data = {
-		.sd = NULL, .ob = ob, .nodes = nodes, .totnode = totnode,
+		.sd = NULL, .ob = ob, .brush = brush, .nodes = nodes, .totnode = totnode,
 		.has_bm_orco = has_bm_orco, .area_cos = area_cos, .area_nos = NULL, .count = count,
 	};
 	BLI_mutex_init(&data.mutex);
diff --git a/source/blender/editors/space_file/file_ops.c b/source/blender/editors/space_file/file_ops.c
index ab1bcbaa8b5..22c1214d928 100644
--- a/source/blender/editors/space_file/file_ops.c
+++ b/source/blender/editors/space_file/file_ops.c
@@ -2203,7 +2203,7 @@ static int file_rename_poll(bContext *C)
 			poll = false;
 		}
 		else {
-			char dir[FILE_MAX];
+			char dir[FILE_MAX_LIBEXTRA];
 			if (filelist_islibrary(sfile->files, dir, NULL)) {
 				poll = false;
 			}
@@ -2235,7 +2235,7 @@ static int file_delete_poll(bContext *C)
 	SpaceFile *sfile = CTX_wm_space_file(C);
 
 	if (sfile && sfile->params) {
-		char dir[FILE_MAX];
+		char dir[FILE_MAX_LIBEXTRA];
 		int numfiles = filelist_files_ensure(sfile->files);
 		int i;
 		int num_selected = 0;
diff --git a/source/blender/editors/space_sequencer/sequencer_edit.c b/source/blender/editors/space_sequencer/sequencer_edit.c
index 407f4306fec..a1549f39b7c 100644
--- a/source/blender/editors/space_sequencer/sequencer_edit.c
+++ b/source/blender/editors/space_sequencer/sequencer_edit.c
@@ -1232,7 +1232,7 @@ static int sequencer_snap_invoke(bContext *C, wmOperator *op, const wmEvent *UNU
 void SEQUENCER_OT_snap(struct wmOperatorType *ot)
 {
 	/* identifiers */
-	ot->name = "Snap Strips";
+	ot->name = "Snap Strips to Frame";
 	ot->idname = "SEQUENCER_OT_snap";
 	ot->description = "Frame where selected strips will be snapped";
 	
diff --git a/source/blender/windowmanager/intern/wm_files_link.c b/source/blender/windowmanager/intern/wm_files_link.c
index af0d2be8097..dbf0ff90ada 100644
--- a/source/blender/windowmanager/intern/wm_files_link.c
+++ b/source/blender/windowmanager/intern/wm_files_link.c
@@ -319,7 +319,7 @@ static int wm_link_append_exec(bContext *C, wmOperator *op)
 	SceneLayer *sl = CTX_data_scene_layer(C);
 	PropertyRNA *prop;
 	WMLinkAppendData *lapp_data;
-	char path[FILE_MAX_LIBEXTRA], root[FILE_MAXDIR], libname[FILE_MAX], relname[FILE_MAX];
+	char path[FILE_MAX_LIBEXTRA], root[FILE_MAXDIR], libname[FILE_MAX_LIBEXTRA], relname[FILE_MAX];
 	char *group, *name;
 	int totfiles = 0;
 	short flag;
diff --git a/tests/python/cycles_render_tests.py b/tests/python/cycles_render_tests.py
index 2122150467c..731996df8ef 100755
--- a/tests/python/cycles_render_tests.py
+++ b/tests/python/cycles_render_tests.py
@@ -43,7 +43,8 @@ def print_message(message, type=None, status=''):
         status_text = "  FAILED  "
     else:
         status_text = status
-    print("[{}]" . format(status_text), end="")
+    if status_text:
+        print("[{}]" . format(status_text), end="")
     print(COLORS.ENDC, end="")
     print(" {}" . format(message))
     sys.stdout.flush()