Note: you can also intersperse your movie-making commands throughout your whole code, like we did with the vid extension earlier in the course.
This part needs to be run first:
raytracing:output-resolution 600 400
raytracing:start-movie "movietest" 10
But then, after that, you can put raytracing:render-next-movie-frame
anywhere in your code, just like we did with vid:record-view
.