diff --git a/Program.cs b/Program.cs
index 1e840ac..7fad12a 100644
--- a/Program.cs
+++ b/Program.cs
@@ -285,7 +285,7 @@ public class Game : GameWindow {
     int photoWidth = (int) (1.0 * windowHeight / active.Height * active.Width);
     int letterboxWidth = (maxPhotoWidth - photoWidth) / 2;
 
-    SetVertices(letterboxWidth, 0, photoWidth + letterboxWidth, windowHeight);
+    SetVertices(letterboxWidth, 0, photoWidth, windowHeight);
     GL.BindBuffer(BufferTarget.ArrayBuffer, VertexBufferObject);
     GL.BufferData(BufferTarget.ArrayBuffer, vertices.Length * sizeof(float), vertices, BufferUsageHint.DynamicDraw);
     GL.ActiveTexture(TextureUnit.Texture0);
@@ -294,7 +294,7 @@ public class Game : GameWindow {
     GL.DrawElements(PrimitiveType.Triangles, indices.Length, DrawElementsType.UnsignedInt, 0);
 
     for (int i = 0; i < textures.Count; i++) {
-      SetVertices(windowWidth - thumbnailWidth, i * thumbnailHeight, windowWidth, i * thumbnailHeight + thumbnailHeight - borderWidth);
+      SetVertices(windowWidth - thumbnailWidth, i * thumbnailHeight, thumbnailWidth, thumbnailHeight - borderWidth);
       GL.BindBuffer(BufferTarget.ArrayBuffer, VertexBufferObject);
       GL.BufferData(BufferTarget.ArrayBuffer, vertices.Length * sizeof(float), vertices, BufferUsageHint.DynamicDraw);
       GL.ActiveTexture(TextureUnit.Texture0);
@@ -317,7 +317,7 @@ public class Game : GameWindow {
     GL.Viewport(0, 0, windowWidth, windowHeight);
   }
 
-  private void SetVertices(float left, float top, float right, float bottom) {
+  private void SetVertices(float left, float top, float width, float height) {
     // top left
     vertices[0] = left;
     vertices[1] = top;
@@ -326,22 +326,22 @@ public class Game : GameWindow {
     vertices[4] = 0f;
 
     // top right
-    vertices[5] = right;
+    vertices[5] = left + width;
     vertices[6] = top;
     vertices[7] = 0f;
     vertices[8] = 1f;
     vertices[9] = 0f;
 
     // bottom right
-    vertices[10] = right;
-    vertices[11] = bottom;
+    vertices[10] = left + width;
+    vertices[11] = top + height;
     vertices[12] = 0f;
     vertices[13] = 1f;
     vertices[14] = 1f;
 
     // bottom left
     vertices[15] = left;
-    vertices[16] = bottom;
+    vertices[16] = top + height;
     vertices[17] = 0f;
     vertices[18] = 0f;
     vertices[19] = 1f;