This is not the first time trying to solve this problem, which is why I'm writing a self-answered question, after spending another hour to re-discover a solution.
How do I force Asymptote to output a PDF or EPS with a given exact page size, regardless of what graphical elements are drawn into it and without scaling the content?
size(width, height)command, e.g.,
size()does not prevent the output page to be smaller than requested. Also, its documentation talks about scaling of the graphic, which I do not want to happen.