I see no reason why you cannot use a high quality camouflage tent on your travels.
What most landowners are concerned about, are campers who do not first ask their permission if they can use their land.
If your camping in a designated area, designed for camping, leave the area pristine, free of any litter, and respect the area you are camping in.
The thing i noticed the most, whilst visiting Tobermorey on Mull, was how clean the area was, not a bit of litter in sight, no graphitti, just the perfect little seaside town on the West coast.
The same applied to the various campsites i saw on my travels, they were all immaculate, with hardly any litter in sight.
I have no idea if theres a different code of conduct for visitors to the remoter areas of Scotland, but the respect shown by virtually all its visitors was most refreshing to see.
I do not believe there are any rules or regulations on the kind of tents us walkes are allowed to use on our travels.
Arrive, pitch up the tent, and leave as if you were never there at all.
If you intend to wild camp, and know the area is owned by a local farmer, seek their permission first, its goes without saying, respect a farmers property and way of life, and hopefully they will respect you, by giving their blessing for an overnight stay on their land.