diff --git a/python/tutorials/tutorial_001_data_types.py b/python/tutorials/tutorial_101_data_types.py
similarity index 100%
rename from python/tutorials/tutorial_001_data_types.py
rename to python/tutorials/tutorial_101_data_types.py
diff --git a/python/tutorials/tutorial_002_point_cloud.py b/python/tutorials/tutorial_102_point_cloud.py
similarity index 100%
rename from python/tutorials/tutorial_002_point_cloud.py
rename to python/tutorials/tutorial_102_point_cloud.py
diff --git a/python/tutorials/tutorial_101_viewer.py b/python/tutorials/tutorial_201_viewer.py
similarity index 100%
rename from python/tutorials/tutorial_101_viewer.py
rename to python/tutorials/tutorial_201_viewer.py
diff --git a/python/tutorials/tutorial_102_rendering_styles.py b/python/tutorials/tutorial_202_rendering_styles.py
similarity index 92%
rename from python/tutorials/tutorial_102_rendering_styles.py
rename to python/tutorials/tutorial_202_rendering_styles.py
index aaf9d727..57497c51 100644
--- a/python/tutorials/tutorial_102_rendering_styles.py
+++ b/python/tutorials/tutorial_202_rendering_styles.py
@@ -55,7 +55,11 @@
 # Get the drawable responsible for rendering the triangles (surface) of the model.
 sphere_faces = sphere.renderer().get_triangles_drawable("faces")
 sphere_faces.set_visible(True)  # Ensure the surface is visible.
-sphere_faces.set_color(easy3d.vec4(0.8, 0.8, 0.3, 1.0))  # Set the surface color (RGBA).
+# This "/data/sphere.obj" file contains texture coordinates, and it will be rendered
+# with the default checkboard texture. You can comment the two lines below to check
+# out the textured rendering.
+sphere_faces.set_coloring_method(easy3d.State.UNIFORM_COLOR)    # Set uniform color rendering.
+sphere_faces.set_color(easy3d.vec4(0.8, 0.8, 0.3, 1.0))         # Set the surface color (RGBA).
 
 # Customize the vertex rendering:
 # Get the drawable responsible for rendering the vertices of the model.
diff --git a/python/tutorials/tutorial_103_multiview.py b/python/tutorials/tutorial_203_multiview.py
similarity index 100%
rename from python/tutorials/tutorial_103_multiview.py
rename to python/tutorials/tutorial_203_multiview.py
diff --git a/python/tutorials/tutorial_104_offscreen.py b/python/tutorials/tutorial_204_offscreen.py
similarity index 100%
rename from python/tutorials/tutorial_104_offscreen.py
rename to python/tutorials/tutorial_204_offscreen.py
diff --git a/python/tutorials/tutorial_201_normal_estimtion.py b/python/tutorials/tutorial_301_normal_estimtion.py
similarity index 100%
rename from python/tutorials/tutorial_201_normal_estimtion.py
rename to python/tutorials/tutorial_301_normal_estimtion.py
diff --git a/python/tutorials/tutorial_202_surface_reconstruction.py b/python/tutorials/tutorial_302_surface_reconstruction.py
similarity index 100%
rename from python/tutorials/tutorial_202_surface_reconstruction.py
rename to python/tutorials/tutorial_302_surface_reconstruction.py
diff --git a/python/tutorials/tutorial_203_plane_extraction.py b/python/tutorials/tutorial_303_plane_extraction.py
similarity index 100%
rename from python/tutorials/tutorial_203_plane_extraction.py
rename to python/tutorials/tutorial_303_plane_extraction.py
diff --git a/python/tutorials/tutorial_204_point_cloud_downsampling.py b/python/tutorials/tutorial_304_point_cloud_downsampling.py
similarity index 100%
rename from python/tutorials/tutorial_204_point_cloud_downsampling.py
rename to python/tutorials/tutorial_304_point_cloud_downsampling.py