And this is probably more what airflow looks like without a shroud (but with some minor spacing, like a PA or MCR)....unfortunately PSCS3 doesn't want to measure the density of red for me





EDIT: anyway, I think regardless the shroud's main advantages aren't from spreading the air out (though that probably helps ever-so-slightly)...but rather from an actual increase in airflow (fans don't like have something RIGHT against them) and from a decrease in turbulence noise.