1 files changed, 31 insertions, 1 deletions

diff --git a/README.md b/README.md
index b716c16..efbbeef 100644
--- a/README.md
+++ b/README.md
@@ -25,14 +25,44 @@ crate to work.
 # Running
 The application accepts the following arguments.
 `--config` path to the config file.
-`--scene` path to the scene file.
+`--scene` path to the scene file (only supports yml).
+`--image-action` (png, show).
+    Png saves the resulting image to `image_output_dir`.
+    Show just stops the rendering once its done and waits
+    for you to press `R` again to continue with the real-time render.
+
 
 Just running it without any arguments will use the default config and
 scene provided by this repository. Once the application starts it will
 present a crude preview image of the scene.
 
+![preview](./assets/preview.png)
+
+## Configuration
+The configuration file has two blocks that controls the preview
+quality and the render quality.  You can set the number of samples,
+max_depth etc through threre.
 
 ## Controls
 `WASD` Moves the camera in a currently crude way.
 `R` Starts rendering the image.
 
+## Rendering Progress
+As you start rendering the image it will replace preview image with a
+more refined one with the settings from the render block in your
+configuration file.
+
+![preview](./assets/preview.png)
+
+
+![in_progress](./assets/in_progress.png)
+
+
+![in_progress2](./assets/in_progress_2.png)
+
+
+![sample](./assets/trace_sample.png)
+
+
+Once the image is done rendering it will go forward with the selected
+image action.