diff --git a/ArchitectureColoredPainting/RendererWidget.ui b/ArchitectureColoredPainting/RendererWidget.ui
index b1d80e8..85c5a86 100644
--- a/ArchitectureColoredPainting/RendererWidget.ui
+++ b/ArchitectureColoredPainting/RendererWidget.ui
@@ -165,6 +165,19 @@
        <property name="rightMargin">
         <number>12</number>
        </property>
+       <item>
+        <widget class="QSlider" name="lightRadianceSlider">
+         <property name="minimum">
+          <number>0</number>
+         </property>
+         <property name="maximum">
+          <number>600</number>
+         </property>
+         <property name="orientation">
+          <enum>Qt::Vertical</enum>
+         </property>
+        </widget>
+       </item>
        <item>
         <widget class="QSlider" name="horizontalSlider">
          <property name="sizePolicy">
diff --git a/ArchitectureColoredPainting/src/Renderer/RendererGLWidget.cpp b/ArchitectureColoredPainting/src/Renderer/RendererGLWidget.cpp
index afdf33b..35421cc 100644
--- a/ArchitectureColoredPainting/src/Renderer/RendererGLWidget.cpp
+++ b/ArchitectureColoredPainting/src/Renderer/RendererGLWidget.cpp
@@ -14,7 +14,7 @@
 
 using namespace Renderer;
 
-QVector3D mainLightRadiance = 40 * QVector3D(0.7529, 0.7450, 0.6784).normalized();
+QVector3D mainLightRadiance = 10 * QVector3D(0.7529, 0.7450, 0.6784).normalized();
 static float sunPitch = 105, sunYaw = 80;
 static int sunSpeed = 10;
 
@@ -89,6 +89,11 @@ void RendererGLWidget::setModel(QString path)
 	doneCurrent();
 }
 
+void Renderer::RendererGLWidget::setMainLightRadiance(QVector3D radiance)
+{
+	mainLightRadiance = radiance;
+}
+
 void RendererGLWidget::setMainLightPitch(float pitch)
 {
 	//qDebug() << "pitch" << pitch;
@@ -344,30 +349,34 @@ void RendererGLWidget::paintGL()
 		if (model != nullptr)
 			model->draw();
 
-		//plainProgramPtr->bind();
-		//plainProgramPtr->setUniformValue("projection", projection);
-		//plainProgramPtr->setUniformValue("view", view);
-		//plainProgramPtr->setUniformValue("albedo", 0.5f, 0.5f, 0.5f);
-		//QMatrix4x4 model;
-		//int nrRows = 7, nrColumns = 7;
-		//float spacing = 2.5;
-		//for (int row = 0; row < nrRows; ++row)
-		//{
-		//	plainProgramPtr->setUniformValue("metallic", (float)row / (float)nrRows);
-		//	for (int col = 0; col < nrColumns; ++col)
-		//	{
-		//		plainProgramPtr->setUniformValue("roughness", glm::clamp((float)col / (float)nrColumns, 0.05f, 1.0f));
+		/// Debug Lighting
+		if (false)
+		{
+			plainProgramPtr->bind();
+			plainProgramPtr->setUniformValue("projection", projection);
+			plainProgramPtr->setUniformValue("view", view);
+			plainProgramPtr->setUniformValue("albedo", 0.5f, 0.5f, 0.5f);
+			QMatrix4x4 model;
+			int nrRows = 7, nrColumns = 7;
+			float spacing = 2.5;
+			for (int row = 0; row < nrRows; ++row)
+			{
+				plainProgramPtr->setUniformValue("metallic", (float)row / (float)nrRows);
+				for (int col = 0; col < nrColumns; ++col)
+				{
+					plainProgramPtr->setUniformValue("roughness", glm::clamp((float)col / (float)nrColumns, 0.05f, 1.0f));
 
-		//		model.setToIdentity();
-		//		model.scale(10);
-		//		model.translate(QVector3D((float)(col - (nrColumns / 2)) * spacing,
-		//			(float)(row - (nrRows / 2)) * spacing + 20,
-		//			-2.0f));
-		//		plainProgramPtr->setUniformValue("model", model);
-		//		IblUtils::renderSphere(glFunc);
-		//	}
-		//}
-		//plainProgramPtr->release();
+					model.setToIdentity();
+					model.scale(10);
+					model.translate(QVector3D((float)(col - (nrColumns / 2)) * spacing,
+						(float)(row - (nrRows / 2)) * spacing + 20,
+						-2.0f));
+					plainProgramPtr->setUniformValue("model", model);
+					IblUtils::renderSphere(glFunc);
+				}
+			}
+			plainProgramPtr->release();
+		}
 
 		pageIdDownsampleProgramPtr->bind();
 		gl->BindImageTexture(3, gbuffers[4], 0, GL_FALSE, 0, GL_READ_WRITE, GL_RG16UI);
diff --git a/ArchitectureColoredPainting/src/Renderer/RendererGLWidget.h b/ArchitectureColoredPainting/src/Renderer/RendererGLWidget.h
index c64a7c0..c75e931 100644
--- a/ArchitectureColoredPainting/src/Renderer/RendererGLWidget.h
+++ b/ArchitectureColoredPainting/src/Renderer/RendererGLWidget.h
@@ -29,6 +29,7 @@ namespace Renderer
 
     public slots:
         void setModel(QString path);
+        void setMainLightRadiance(QVector3D radiance);
         void setMainLightPitch(float pitch);
         void setMainLightYaw(float yaw);
         void setExposure(float exposure);
diff --git a/ArchitectureColoredPainting/src/Renderer/RendererWidget.cpp b/ArchitectureColoredPainting/src/Renderer/RendererWidget.cpp
index 1af6db2..d244c41 100644
--- a/ArchitectureColoredPainting/src/Renderer/RendererWidget.cpp
+++ b/ArchitectureColoredPainting/src/Renderer/RendererWidget.cpp
@@ -64,6 +64,9 @@ Renderer::RendererWidget::RendererWidget(QWidget* parent)
 		emit openPaintingFile(paintingPath);
 		});
 
+	QObject::connect(ui.lightRadianceSlider, &QSlider::valueChanged, [&](int value) {
+		ui.openGLWidget->setMainLightRadiance(value / 10.f * QVector3D(0.7529, 0.7450, 0.6784).normalized());
+		});
 	QObject::connect(ui.horizontalSlider, &QSlider::valueChanged,
 		ui.openGLWidget, &Renderer::RendererGLWidget::setMainLightPitch);
 	QObject::connect(ui.horizontalSlider_2, &QSlider::valueChanged,
@@ -71,6 +74,7 @@ Renderer::RendererWidget::RendererWidget(QWidget* parent)
 	QObject::connect(ui.exposureSlider, &QSlider::valueChanged, [&](int value) {
 		ui.openGLWidget->setExposure(value / 100.f);
 		});
+	ui.lightRadianceSlider->setValue(100);
 	ui.horizontalSlider->setValue(105);
 	ui.horizontalSlider_2->setValue(80);
 	ui.exposureSlider->setValue(60);