yea with BIAB and squeezing, which you basically have to do, you are pulling out a lot of the pulverized grains and making your wort dirty as hell
if you are doing it in a mash tun, then you can vorlaught your wort from the bottom to the top to set your bed and remove a lot of that particulate
if you are doing it in a mash tun, then you can vorlaught your wort from the bottom to the top to set your bed and remove a lot of that particulate