diff --git a/android/samples/sample-page-curl/src/main/java/com/google/android/filament/pagecurl/Page.java b/android/samples/sample-page-curl/src/main/java/com/google/android/filament/pagecurl/Page.java
index 8df5b10695..a3d0fd7037 100644
--- a/android/samples/sample-page-curl/src/main/java/com/google/android/filament/pagecurl/Page.java
+++ b/android/samples/sample-page-curl/src/main/java/com/google/android/filament/pagecurl/Page.java
@@ -105,13 +105,13 @@ public class Page {
         final float e = 0.01f;
         final int count = this.positions.capacity() / 3;
 
-        float[] p = new float[3];
-        float[] p1 = new float[3];
-        float[] p2 = new float[3];
-        float[] du = new float[3];
-        float[] dv = new float[3];
-        float[] n = new float[3];
-        float[] q = new float[4];
+        float[] p = new float[3];  // position of the current vertex
+        float[] p1 = new float[3]; // position of neighboring vertex along the U axis
+        float[] p2 = new float[3]; // position of neighboring vertex along the V axis
+        float[] du = new float[3]; // tangent vector along the U axis
+        float[] dv = new float[3]; // tangent vector along the V axis
+        float[] n = new float[3];  // normal vector (du x dv)
+        float[] q = new float[4];  // quaternion for the tangent frame
 
         for (int i = 0; i < count; i++) {
             final float u = this.uvs.get(i * 2);
diff --git a/android/samples/sample-page-curl/src/main/java/com/google/android/filament/pagecurl/PageMaterials.java b/android/samples/sample-page-curl/src/main/java/com/google/android/filament/pagecurl/PageMaterials.java
index 9dc2fc3cfb..9525b1289a 100644
--- a/android/samples/sample-page-curl/src/main/java/com/google/android/filament/pagecurl/PageMaterials.java
+++ b/android/samples/sample-page-curl/src/main/java/com/google/android/filament/pagecurl/PageMaterials.java
@@ -46,7 +46,7 @@ public class PageMaterials {
     }
 
     public PageMaterials(Engine engine, AssetManager assets) {
-        ByteBuffer asset = readAsset(assets, "materials/lit.filamat");
+        ByteBuffer asset = readAsset(assets, "materials/curl.filamat");
         assert asset != null;
         mMaterial = new Material.Builder()
                 .payload(asset, asset.remaining())
diff --git a/android/samples/sample-page-curl/src/main/materials/lit.mat b/android/samples/sample-page-curl/src/main/materials/curl.mat
similarity index 99%
rename from android/samples/sample-page-curl/src/main/materials/lit.mat
rename to android/samples/sample-page-curl/src/main/materials/curl.mat
index b9d9d7a3f7..7823e389ad 100644
--- a/android/samples/sample-page-curl/src/main/materials/lit.mat
+++ b/android/samples/sample-page-curl/src/main/materials/curl.mat
@@ -1,5 +1,5 @@
 material {
-    name : lit,
+    name : curl,
     shadingModel : lit,
     doubleSided: true,
     parameters : [
diff --git a/android/samples/sample-page-curl/src/main/res/values/strings.xml b/android/samples/sample-page-curl/src/main/res/values/strings.xml
index 1b86ac0a01..27eb5af3ee 100644
--- a/android/samples/sample-page-curl/src/main/res/values/strings.xml
+++ b/android/samples/sample-page-curl/src/main/res/values/strings.xml
@@ -1,3 +1,3 @@
 <resources>
-  <string name="app_name">Lit Cube</string>
+  <string name="app_name">Page Curl</string>
 </resources>