I put the bamboo in there to keep a more rectangular, rigid, straight tent . The internal pressure is negative like its being sucked out real fast and it wants to implode in on itself. All the tent sides become curved, It's a strong enough tent, but you lose more than just a few inches all around from the air being sucked out. It makes more room in the tent and allows for more even reflecting of the light from straight side walls then fun house mirror walls. . It was really bad in a 4x4 tent when I didn't put any poles up, not as bad in a 2x2 but still necessary. I duct taped the ends of the bamboo poles so they wouldn't be sharp, and I cut and measured each one from 4 foot and 5 foot bamboo poles but you could probably use 2 foot ones but they are not always very straight and are curved. I considered using wood or pvc.
