A default image will be automatically be rendered upon loading this page (no interaction necessary). However, before the render can start, some assets need to be downloaded, so there might be a short delay before the view port starts rendering.
The view port settings can be changed in the render settings panel below the view port. After changing the desired settings, click the "Render" button to begin rendering to the view port (potentially after a short delay to download assets). If the render is taking too long, try reducing the quality by adjusting the view port settings.
Click on the view port to inspect a ray fired into the scene at that location.
Click on the "gallery" link in the links panel to view some pregenerated images of this project. This is useful if the image takes too long to render on your machine. It also shows the progression of this project over time as more features were added.
Click on the "save image" link to download the current state of the render to a file.