diff --git a/src/graphics.cpp b/src/graphics.cpp
index bc090f4..3b9e880 100644
--- a/src/graphics.cpp
+++ b/src/graphics.cpp
@@ -175,11 +175,11 @@ void initModel () {
 
 }
 
-void updateModel(glm::vec2 headPos, glm::vec2 facePos, bool mouthOpen) {
+void updateModel(glm::vec2 headPos, glm::vec2 facePos, float scale, bool mouthOpen) {
 	//calculate transforms
-	parts[0].setPosition(headPos);
-	parts[1].setPosition(facePos);
-	parts[2].setPosition(facePos);
+	parts[0].setTransform(headPos, scale);
+	parts[1].setTransform(facePos, scale);
+	parts[2].setTransform(facePos, scale);
 
 	//set mouth texture to open or closed
 	parts[2].selectTexture(mouthOpen ? 1 : 0);
diff --git a/src/graphics.hpp b/src/graphics.hpp
index 6c1bb0e..8bbac13 100644
--- a/src/graphics.hpp
+++ b/src/graphics.hpp
@@ -16,6 +16,6 @@ void initShader();
 
 void printShaderCompileLog(GLuint shader);
 
-void updateModel(glm::vec2 headPos, glm::vec2 facePos, bool mouthOpen);
+void updateModel(glm::vec2 headPos, glm::vec2 facePos, float scale, bool mouthOpen);
 
 #endif
diff --git a/src/main.cpp b/src/main.cpp
index 99b58bf..99691ca 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -8,7 +8,8 @@
 int main () {
 	initGraphics();
 
-	cv::CascadeClassifier faceDetector ("lbpcascade_frontalface_improved.xml");
+	//TODO: switch to DNN face detection
+	cv::CascadeClassifier faceDetector ("haarcascade_frontalface_alt2.xml");
 
 	cv::Ptr<cv::face::Facemark> facemark = cv::face::FacemarkLBF::create();
 	facemark->loadModel ("lbfmodel.yaml");
@@ -57,6 +58,7 @@ int main () {
 			cv::circle (frame, landmarks[biggestFace][62], 3, cv::Scalar (0, 255, 0));
 
 			//send control information to graphics
+			float faceSize = landmarks[biggestFace][14].x - landmarks[biggestFace][2].x;
 			updateModel(glm::vec2(
 				(landmarks[biggestFace][2].x + landmarks[biggestFace][14].x) / 2
 					* 2 / (float)frame.cols - 1,
@@ -67,7 +69,8 @@ int main () {
 				landmarks[biggestFace][30].x * 2 / (float)frame.cols - 1,
 				landmarks[biggestFace][30].y * 2 / (float)frame.rows - 1
 				),
-				landmarks[biggestFace][66].y - landmarks[biggestFace][62].y > 5);
+				faceSize * 6 / (float)frame.cols,
+				(landmarks[biggestFace][66].y - landmarks[biggestFace][62].y) / faceSize > 0.04f);
 		}
 
 		graphicsFrame ();
diff --git a/src/modelpart.cpp b/src/modelpart.cpp
index 380016b..b5b8e35 100644
--- a/src/modelpart.cpp
+++ b/src/modelpart.cpp
@@ -29,8 +29,9 @@ void ModelPart::bindAndDraw() {
 	glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
 }
 
-void ModelPart::setPosition(glm::vec2 position) {
+void ModelPart::setTransform(glm::vec2 position, float scale) {
 	transMatrix = glm::translate(glm::mat4(1.0f), glm::vec3(position.x, -position.y, 0.0f));
+	transMatrix = glm::scale(transMatrix, glm::vec3(scale, scale, scale));
 }
 
 void ModelPart::addTexture(const char* texPath, size_t slot) {
diff --git a/src/modelpart.hpp b/src/modelpart.hpp
index 89222a4..054bb6d 100644
--- a/src/modelpart.hpp
+++ b/src/modelpart.hpp
@@ -20,7 +20,7 @@ class ModelPart {
 
 		void bindAndDraw();
 
-		void setPosition(glm::vec2 position);
+		void setTransform(glm::vec2 position, float scale);
 
 		void addTexture(const char* texPath, size_t slot);