diff --git a/blender_viz/README.md b/blender_viz/README.md
index 9363588..49f8d4e 100644
--- a/blender_viz/README.md
+++ b/blender_viz/README.md
@@ -2,9 +2,10 @@
 
 1. Download [Blender](https://www.blender.org/download/) and unzip to `$PATH_TO_BLENDER`. We used Blender 3.3.0.
 2. Clone `https://github.com/HTDerekLiu/BlenderToolbox` under `$BLENDER_PATH`
-3. In `blender_script.py`, set `BLENDER_PATH` accordingly. Also set `mesh_folder_path` and `output_path` to the source mesh folder path and the desired output path.
+3. In c, set `BLENDER_PATH` accordingly. Also set `mesh_folder_path` and `output_path` to the source mesh folder path and the desired output path.
 4. Change the scale and orientation of the mesh to render in `blender_script.py` if necessary
-5. Run `$PATH_TO_BLENDER/blender --background --python ./blender_script.py`
+5. Optionally, change the number of samples （`num_samples`) in `blender_viz` to balance between speed and quality
+6. Run `$PATH_TO_BLENDER/blender --background --python ./blender_script.py`
 
 
 ## Acknowledgement