diff --git a/README b/README
index 073e855ebe19ccb987f59a9705604c6824594b40..23425e84c294db9a81892ee254ee732a4dc0a6dd 100644
--- a/README
+++ b/README
@@ -13,7 +13,9 @@ To build, simply run qmake and make.
 To configure, you can set in the file ~/.panorc the following options.
         shader_dir=<path to directory containing the shader files>
         image_file=<path to the desired input file>
+        max_fov=<starting value of max_fov, in degrees>
 Lines in the file must start with option names, and no spaces should go
 between option names, equal signs and values. If no shader path is set, the
 default is ./shaders/. If no input file is set, or the file is missing, a
-file chooser will be shown at startup.
+file chooser will be shown at startup. The default value of max_fov is 60
+degrees.
diff --git a/TODO b/TODO
new file mode 100644
index 0000000000000000000000000000000000000000..10b3bdf158029654675916a5778ddeb149a76624
--- /dev/null
+++ b/TODO
@@ -0,0 +1,9 @@
+Higher priority:
+-Study singular points of the transformations and fix the image in those
+cases.
+
+Lower priority:
+-Discretize grid, add a parameter grid_discr=5x5, 10x10, 15x15, ...
+-Add a parameter for the grid resolution.
+-Compute a limit for the discretization (298 degrees?).
+-Change squares by triangles on the top and on the bottom of the sphere.