I keep one window open. It is dark enough in there that you can't see anything inside (from the outside) if all the other windows are closed. Some guys shoot through the netting but I have had very inconsistent results when I tested it so I just keep a window open. I am typically hunting a waterhole or trail so my shot windows are limited anyway.
Here is a pic of an antelope and pop up blind. Sticks out like a turd in a punchbowl. They know it's there and keep an eye on that strange blob but after a while they decide it's ok and come on in.
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This pic is of my son standing on my elk waterhole looking at my blind that is hidden in the trees 30 yards up the hill.
[Linked Image]

Last edited by centershot; 03/29/19.

A true sportsman counts his achievements in proportion to the effort involved and fairness of the sport. - S. Pope