diff --git a/FORK.md b/FORK.md
index be3a5f7..809126b 100644
--- a/FORK.md
+++ b/FORK.md
@@ -58,6 +58,9 @@ python3 format_dataset.py
 Before training you can visualise your camera poses using the
 `camera_visualizer/visualize_cameras.py` script.
 
+Note: the `cam_dict_norm.json` file is the `kai_cameras_normalized.json`
+created by the colmap wrapper. Or you can use the `vizu.py` script.
+
 ### Training the model
 
 You then need to create the configuration file, copying the example in