diff --git a/README.md b/README.md
index 2965a1a..7a143b9 100644
--- a/README.md
+++ b/README.md
@@ -52,9 +52,10 @@ The path to the json file used to manage all the metadata linked to texturesets
 
 ### Configuration of the json file
 
-- « `name` » is the mundane texture name
-- « `description` » is the description of the texture
-- « `type` » is the subfolder name in `BLENDFILES_FOLDER` in the `local-config.mk` file the blender files used to generate the rpeviews are stored
-- « `destination_1024` » is the folders names list where to copy the generated textrues files in 1024x1024, it can be left with an empty field if non-relevant.
-- « `destination_512` » is the folders names list where to copy the generated textrues files in 512x512, it can be left with an empty field if non-relevant.
-- « `destination_256` » is the folders names list where to copy the generated textrues files in 256x256, it can be left with an empty field if non-relevant.
+- `name` is the mundane texture name
+- `description` is the description of the texture
+- `type` is the subfolder name in `BLENDFILES_FOLDER` in the `local-config.mk` file the blender files used to generate the rpeviews are stored
+- `format` is the format of the texture, square or rectangular, it must be either "10,10" for normal 1024x1024 files, "9,10" for 512x1024 and "10,9" for 1024x512
+- `destination_1024` is the folders names list where to copy the generated textrues files in 1024x1024, it can be left with an empty field if non-relevant.
+- `destination_512` is the folders names list where to copy the generated textrues files in 512x512, it can be left with an empty field if non-relevant.
+- `destination_256` is the folders names list where to copy the generated textrues files in 256x256, it can be left with an empty field if non-relevant.