diff --git a/Assignments/Assignment2/Application2.cpp b/Assignments/Assignment2/Application2.cpp
index 6a2c72f..3af9b01 100644
--- a/Assignments/Assignment2/Application2.cpp
+++ b/Assignments/Assignment2/Application2.cpp
@@ -110,8 +110,21 @@ Vec3fa ACESFilm(Vec3fa x, float exposure) {
     return (x * (a * x + b)) / (x * (c * x + d) + e);
 }
 
-/* task that renders a single screen tile */
+// Function that selects implementation at runtime
 Vec3fa Application2::renderPixel(float x, float y, const ISPCCamera& camera, RayStats& stats, RandomSampler& sampler) {
+    if (selected == 0) {
+        return renderPixelOrig(x, y, camera, stats, sampler);
+    } else {
+        return Vec3fa(0.0f);
+    }
+}
+
+Vec3fa Application2::renderPixelHomogeneous(float x, float y, const ISPCCamera& camera, RayStats& stats, RandomSampler& sampler) {
+    return Vec3fa(0.0f);
+}
+
+/* task that renders a single screen tile */
+Vec3fa Application2::renderPixelOrig(float x, float y, const ISPCCamera& camera, RayStats& stats, RandomSampler& sampler) {
     /* radiance accumulator and weight */
     Vec3fa L = Vec3fa(0.0f);
     Vec3fa Lw = Vec3fa(1.0f);
diff --git a/Assignments/Assignment2/Application2.h b/Assignments/Assignment2/Application2.h
index ae51d05..277940e 100644
--- a/Assignments/Assignment2/Application2.h
+++ b/Assignments/Assignment2/Application2.h
@@ -9,9 +9,28 @@ public:
 
 private:
     Vec3fa renderPixel(float x, float y, const ISPCCamera& camera, RayStats& stats, RandomSampler& sampler) override;
+    Vec3fa renderPixelOrig(float x, float y, const ISPCCamera& camera, RayStats& stats, RandomSampler& sampler);
+    Vec3fa renderPixelHomogeneous(float x, float y, const ISPCCamera& camera, RayStats& stats, RandomSampler& sampler);
 
     void drawGUI() override {
         ImGui::Checkbox("Bounding Box", &boundingBox);
+
+        const char* items[] = {"Original", "Homogeneous"};
+        ImGui::Combo("Version", &selected, items, 2);
+
+        const char* scenes[] = {"Gnome", "Horse", "Heterogenous"};
+        int oldscene = scene;
+        ImGui::Combo("Scenes", &scene, scenes, 3);
+        if (scene != oldscene) {
+            Data_Destructor(&data);
+            Data_Constructor(&data, 1, 8);
+            if (scene == 0)
+                gnomeScene();
+            if (scene == 1)
+                horseScene();
+            if (scene == 2)
+                heterogenousScene();
+        }
     }
 
     void initScene() override;
@@ -24,6 +43,7 @@ private:
 
     void heterogenousScene();
 
-    float colorLight[3] = {1.0f, 1.0f, 1.0f};
     bool boundingBox = true;
+    int selected = 0;
+    int scene = 0;
 };