Shooting partner Paul Payne and I probably build hides in the middle of fields on more than 50% of our outings.
Once you have got past the idea that pigeons are naturally wary of hides popping up in the middle of their restaurant, the advantages are manifold.
First, you can build it exactly where pigeons want to feed and, second, you have 360 degree field of view and therefore field of fire.
Thirdly, picking up the shot birds is always easier if you are not dropping them in thick cover.
Pigeons simply do not have the power to reason that a square of camo netting represents danger, provided they cannot see you sitting inside.
By all means add natural cover to it if it makes you feel better, but in most instances, even this is not necessary when pigeon shooting.