Hey Juanjo-
We are trying to optimize our scenes but we are not sure where to begin since all we have is "WAITING..." to go by. Is there any way to have that part of the render feedback be a bit more precise on what is taking place that takes more than 5x longer than the render itself or the loading or pre-processing? Can you give us a list of what part of the process is happening there so we can pinpoint where to optimize?