From aaac4e965e001d9a491f0bbca02893641cdf3ddc Mon Sep 17 00:00:00 2001
From: Sergey Sharybin <sergey.vfx@gmail.com>
Date: Thu, 28 Jul 2016 12:13:11 +0200
Subject: [PATCH] Cycles: Add some extra logging for light debugging

---
 intern/cycles/render/light.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/intern/cycles/render/light.cpp b/intern/cycles/render/light.cpp
index 6a1437fefb9..34c5eac76fd 100644
--- a/intern/cycles/render/light.cpp
+++ b/intern/cycles/render/light.cpp
@@ -260,6 +260,7 @@ void LightManager::device_update_distribution(Device *device, DeviceScene *dscen
 	}
 
 	size_t num_distribution = num_triangles + num_lights;
+	VLOG(1) << "Total " << num_distribution << " of light distribution primitives.";
 
 	/* emission area */
 	float4 *distribution = dscene->light_distribution.resize(num_distribution + 1);
@@ -617,11 +618,12 @@ void LightManager::device_update_points(Device *device,
 		}
 	}
 
-
 	float4 *light_data = dscene->light_data.resize(num_lights*LIGHT_SIZE);
 
-	if(num_lights == 0)
+	if(num_lights == 0) {
+		VLOG(1) << "No effective light, ignoring points update.";
 		return;
+	}
 
 	int light_index = 0;